diff --git a/src/compiler.ts b/src/compiler.ts
index a2dce12390..588ececa43 100644
--- a/src/compiler.ts
+++ b/src/compiler.ts
@@ -9242,7 +9242,8 @@ export class Compiler extends DiagnosticEmitter {
       // do not attempt to compile if inlined anyway
       if (!instance.hasDecorator(DecoratorFlags.INLINE)) this.compileFunction(instance);
     } else {
-      // clone base constructor if a derived class
+      // clone base constructor if a derived class. note that we cannot just
+      // call the base ctor since the derived class may have additional fields.
       let baseClass = classInstance.base;
       let contextualTypeArguments = uniqueMap(classInstance.contextualTypeArguments);
       if (baseClass) {
@@ -9276,15 +9277,18 @@ export class Compiler extends DiagnosticEmitter {
           new Signature(this.program, null, classInstance.type, classInstance.type),
           contextualTypeArguments
         );
-        let members = classInstance.members;
-        if (!members) classInstance.members = members = new Map();
-        members.set("constructor", instance.prototype);
       }
 
-      instance.internalName = classInstance.internalName + INSTANCE_DELIMITER + "constructor";
       instance.set(CommonFlags.COMPILED);
       instance.prototype.setResolvedInstance("", instance);
+      if (classInstance.is(CommonFlags.MODULE_EXPORT)) {
+        instance.set(CommonFlags.MODULE_EXPORT);
+      }
       classInstance.constructorInstance = instance;
+      let members = classInstance.members;
+      if (!members) classInstance.members = members = new Map();
+      members.set("constructor", instance.prototype);
+
       let previousFlow = this.currentFlow;
       let flow = instance.flow;
       this.currentFlow = flow;
diff --git a/tests/compiler/class-implements.optimized.wat b/tests/compiler/class-implements.optimized.wat
index 64708cfd4b..ea5c4529fc 100644
--- a/tests/compiler/class-implements.optimized.wat
+++ b/tests/compiler/class-implements.optimized.wat
@@ -12,6 +12,7 @@
  (export "A#constructor" (func $class-implements/A#constructor))
  (export "C" (global $class-implements/C))
  (export "C#foo" (func $class-implements/C#foo))
+ (export "C#constructor" (func $class-implements/C#constructor))
  (start $~start)
  (func $~lib/rt/stub/__new (param $0 i32) (result i32)
   (local $1 i32)
@@ -101,6 +102,22 @@
  (func $class-implements/A#foo (param $0 i32) (result i32)
   i32.const 1
  )
+ (func $class-implements/C#constructor (param $0 i32) (result i32)
+  local.get $0
+  i32.eqz
+  if
+   i32.const 5
+   call $~lib/rt/stub/__new
+   local.set $0
+  end
+  local.get $0
+  if (result i32)
+   local.get $0
+  else
+   i32.const 6
+   call $~lib/rt/stub/__new
+  end
+ )
  (func $class-implements/C#foo (param $0 i32) (result i32)
   i32.const 2
  )
@@ -110,13 +127,8 @@
   i32.const 3
   call $~lib/rt/stub/__new
   drop
-  i32.const 5
-  call $~lib/rt/stub/__new
-  i32.eqz
-  if
-   i32.const 6
-   call $~lib/rt/stub/__new
-   drop
-  end
+  i32.const 0
+  call $class-implements/C#constructor
+  drop
  )
 )
diff --git a/tests/compiler/class-implements.untouched.wat b/tests/compiler/class-implements.untouched.wat
index 9183b0aee1..d8923c0fc2 100644
--- a/tests/compiler/class-implements.untouched.wat
+++ b/tests/compiler/class-implements.untouched.wat
@@ -21,6 +21,7 @@
  (export "A#constructor" (func $class-implements/A#constructor))
  (export "C" (global $class-implements/C))
  (export "C#foo" (func $class-implements/C#foo))
+ (export "C#constructor" (func $class-implements/C#constructor))
  (start $~start)
  (func $~lib/rt/stub/computeSize (param $0 i32) (result i32)
   local.get $0
diff --git a/tests/compiler/extends-recursive.optimized.wat b/tests/compiler/extends-recursive.optimized.wat
index eaf97cd657..0493622a51 100644
--- a/tests/compiler/extends-recursive.optimized.wat
+++ b/tests/compiler/extends-recursive.optimized.wat
@@ -1,12 +1,112 @@
 (module
- (type $i32_i32_=>_none (func (param i32 i32)))
  (type $i32_=>_i32 (func (param i32) (result i32)))
+ (type $none_=>_none (func))
+ (type $i32_i32_=>_none (func (param i32 i32)))
  (memory $0 0)
+ (global $~lib/rt/stub/offset (mut i32) (i32.const 0))
  (global $extends-recursive/Child i32 (i32.const 3))
  (export "memory" (memory $0))
  (export "Child" (global $extends-recursive/Child))
  (export "Child#get:child" (func $extends-recursive/Parent#get:child))
  (export "Child#set:child" (func $extends-recursive/Parent#set:child))
+ (export "Child#constructor" (func $extends-recursive/Child#constructor))
+ (start $~start)
+ (func $~lib/rt/stub/__new (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  global.get $~lib/rt/stub/offset
+  global.get $~lib/rt/stub/offset
+  i32.const 4
+  i32.add
+  local.tee $3
+  i32.const 28
+  i32.add
+  local.tee $1
+  memory.size
+  local.tee $4
+  i32.const 16
+  i32.shl
+  i32.const 15
+  i32.add
+  i32.const -16
+  i32.and
+  local.tee $2
+  i32.gt_u
+  if
+   local.get $4
+   local.get $1
+   local.get $2
+   i32.sub
+   i32.const 65535
+   i32.add
+   i32.const -65536
+   i32.and
+   i32.const 16
+   i32.shr_u
+   local.tee $2
+   local.get $2
+   local.get $4
+   i32.lt_s
+   select
+   memory.grow
+   i32.const 0
+   i32.lt_s
+   if
+    local.get $2
+    memory.grow
+    i32.const 0
+    i32.lt_s
+    if
+     unreachable
+    end
+   end
+  end
+  local.get $1
+  global.set $~lib/rt/stub/offset
+  i32.const 28
+  i32.store
+  local.get $3
+  i32.const 4
+  i32.sub
+  local.tee $1
+  i32.const 0
+  i32.store offset=4
+  local.get $1
+  i32.const 0
+  i32.store offset=8
+  local.get $1
+  local.get $0
+  i32.store offset=12
+  local.get $1
+  i32.const 4
+  i32.store offset=16
+  local.get $3
+  i32.const 16
+  i32.add
+ )
+ (func $extends-recursive/Child#constructor (param $0 i32) (result i32)
+  local.get $0
+  i32.eqz
+  if
+   i32.const 3
+   call $~lib/rt/stub/__new
+   local.set $0
+  end
+  local.get $0
+  i32.eqz
+  if
+   i32.const 4
+   call $~lib/rt/stub/__new
+   local.set $0
+  end
+  local.get $0
+  i32.const 0
+  i32.store
+  local.get $0
+ )
  (func $extends-recursive/Parent#get:child (param $0 i32) (result i32)
   local.get $0
   i32.load
@@ -19,4 +119,8 @@
   local.get $1
   i32.store
  )
+ (func $~start
+  i32.const 1036
+  global.set $~lib/rt/stub/offset
+ )
 )
diff --git a/tests/compiler/extends-recursive.untouched.wat b/tests/compiler/extends-recursive.untouched.wat
index 756e08c579..91170a9428 100644
--- a/tests/compiler/extends-recursive.untouched.wat
+++ b/tests/compiler/extends-recursive.untouched.wat
@@ -14,6 +14,7 @@
  (export "Child" (global $extends-recursive/Child))
  (export "Child#get:child" (func $extends-recursive/Parent#get:child))
  (export "Child#set:child" (func $extends-recursive/Parent#set:child))
+ (export "Child#constructor" (func $extends-recursive/Child#constructor))
  (start $~start)
  (func $~lib/rt/stub/computeSize (param $0 i32) (result i32)
   local.get $0
diff --git a/tests/compiler/std/array.optimized.wat b/tests/compiler/std/array.optimized.wat
index 119dc696a8..35953095fd 100644
--- a/tests/compiler/std/array.optimized.wat
+++ b/tests/compiler/std/array.optimized.wat
@@ -428,7 +428,7 @@
  (global $std/array/ArrayStr i32 (i32.const 42))
  (export "memory" (memory $0))
  (export "ArrayU32" (global $std/array/ArrayU32))
- (export "ArrayU32#constructor" (func $~lib/array/Array<u32>#constructor@varargs))
+ (export "ArrayU32#constructor" (func $std/array/ArrayU32#constructor@varargs))
  (export "ArrayU32#get:length" (func $~lib/array/Array<u8>#get:length))
  (export "ArrayU32#set:length" (func $~lib/array/Array<u32>#set:length))
  (export "ArrayU32#every" (func $~lib/array/Array<i32>#every))
@@ -454,7 +454,7 @@
  (export "ArrayU32#flat" (func $~lib/array/Array<u32>#flat))
  (export "ArrayU32#toString" (func $~lib/array/Array<u32>#toString))
  (export "ArrayU8" (global $std/array/ArrayU8))
- (export "ArrayU8#constructor" (func $~lib/array/Array<u8>#constructor@varargs))
+ (export "ArrayU8#constructor" (func $std/array/ArrayU8#constructor@varargs))
  (export "ArrayU8#get:length" (func $~lib/array/Array<u8>#get:length))
  (export "ArrayU8#set:length" (func $~lib/array/Array<u8>#set:length))
  (export "ArrayU8#every" (func $~lib/array/Array<u8>#every))
@@ -480,7 +480,7 @@
  (export "ArrayU8#flat" (func $~lib/array/Array<u32>#flat))
  (export "ArrayU8#toString" (func $~lib/array/Array<u8>#toString))
  (export "ArrayStr" (global $std/array/ArrayStr))
- (export "ArrayStr#constructor" (func $~lib/array/Array<~lib/string/String>#constructor@varargs))
+ (export "ArrayStr#constructor" (func $std/array/ArrayStr#constructor@varargs))
  (export "ArrayStr#get:length" (func $~lib/array/Array<u8>#get:length))
  (export "ArrayStr#set:length" (func $~lib/array/Array<std/array/Ref>#set:length))
  (export "ArrayStr#every" (func $~lib/array/Array<i32>#every))
@@ -19815,7 +19815,7 @@
   i32.load
   call $~lib/rt/pure/__visit
  )
- (func $~lib/array/Array<u32>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayU32#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -19833,6 +19833,15 @@
   end
   local.get $0
   i32.eqz
+  if
+   i32.const 16
+   i32.const 40
+   call $~lib/rt/pure/__new
+   call $~lib/rt/pure/__retain
+   local.set $0
+  end
+  local.get $0
+  i32.eqz
   if
    i32.const 16
    i32.const 7
@@ -20183,7 +20192,7 @@
   local.get $1
   call $~lib/array/Array<u32>#join
  )
- (func $~lib/array/Array<u8>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayU8#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -20200,6 +20209,15 @@
   end
   local.get $0
   i32.eqz
+  if
+   i32.const 16
+   i32.const 41
+   call $~lib/rt/pure/__new
+   call $~lib/rt/pure/__retain
+   local.set $0
+  end
+  local.get $0
+  i32.eqz
   if
    i32.const 16
    i32.const 6
@@ -20640,7 +20658,7 @@
   local.get $1
   call $~lib/array/Array<u8>#join
  )
- (func $~lib/array/Array<~lib/string/String>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayStr#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   block $1of1
    block $0of1
     block $outOfRange
@@ -20653,6 +20671,14 @@
    local.set $1
   end
   local.get $0
+  if (result i32)
+   local.get $0
+  else
+   i32.const 16
+   i32.const 42
+   call $~lib/rt/pure/__new
+   call $~lib/rt/pure/__retain
+  end
   local.get $1
   call $~lib/array/Array<~lib/string/String>#constructor
  )
diff --git a/tests/compiler/std/array.untouched.wat b/tests/compiler/std/array.untouched.wat
index 03c3c0ff01..bbaad8eb2f 100644
--- a/tests/compiler/std/array.untouched.wat
+++ b/tests/compiler/std/array.untouched.wat
@@ -318,7 +318,7 @@
  (global $std/array/ArrayStr i32 (i32.const 42))
  (export "memory" (memory $0))
  (export "ArrayU32" (global $std/array/ArrayU32))
- (export "ArrayU32#constructor" (func $~lib/array/Array<u32>#constructor@varargs))
+ (export "ArrayU32#constructor" (func $std/array/ArrayU32#constructor@varargs))
  (export "ArrayU32#get:length" (func $~lib/array/Array<u32>#get:length))
  (export "ArrayU32#set:length" (func $~lib/array/Array<u32>#set:length))
  (export "ArrayU32#every" (func $~lib/array/Array<u32>#every))
@@ -344,7 +344,7 @@
  (export "ArrayU32#flat" (func $~lib/array/Array<u32>#flat))
  (export "ArrayU32#toString" (func $~lib/array/Array<u32>#toString))
  (export "ArrayU8" (global $std/array/ArrayU8))
- (export "ArrayU8#constructor" (func $~lib/array/Array<u8>#constructor@varargs))
+ (export "ArrayU8#constructor" (func $std/array/ArrayU8#constructor@varargs))
  (export "ArrayU8#get:length" (func $~lib/array/Array<u8>#get:length))
  (export "ArrayU8#set:length" (func $~lib/array/Array<u8>#set:length))
  (export "ArrayU8#every" (func $~lib/array/Array<u8>#every))
@@ -370,7 +370,7 @@
  (export "ArrayU8#flat" (func $~lib/array/Array<u8>#flat))
  (export "ArrayU8#toString" (func $~lib/array/Array<u8>#toString))
  (export "ArrayStr" (global $std/array/ArrayStr))
- (export "ArrayStr#constructor" (func $~lib/array/Array<~lib/string/String>#constructor@varargs))
+ (export "ArrayStr#constructor" (func $std/array/ArrayStr#constructor@varargs))
  (export "ArrayStr#get:length" (func $~lib/array/Array<~lib/string/String>#get:length))
  (export "ArrayStr#set:length" (func $~lib/array/Array<~lib/string/String>#set:length))
  (export "ArrayStr#every" (func $~lib/array/Array<~lib/string/String>#every))
@@ -31992,7 +31992,7 @@
   end
   unreachable
  )
- (func $~lib/array/Array<u32>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayU32#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   block $1of1
    block $0of1
     block $outOfRange
@@ -32006,7 +32006,7 @@
   end
   local.get $0
   local.get $1
-  call $~lib/array/Array<u32>#constructor
+  call $std/array/ArrayU32#constructor
  )
  (func $~lib/array/Array<u32>#fill@varargs (param $0 i32) (param $1 i32) (param $2 i32) (param $3 i32) (result i32)
   block $2of2
@@ -32166,7 +32166,7 @@
   local.get $1
   call $~lib/array/Array<u32>#join
  )
- (func $~lib/array/Array<u8>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayU8#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   block $1of1
    block $0of1
     block $outOfRange
@@ -32180,7 +32180,7 @@
   end
   local.get $0
   local.get $1
-  call $~lib/array/Array<u8>#constructor
+  call $std/array/ArrayU8#constructor
  )
  (func $~lib/array/Array<u8>#fill@varargs (param $0 i32) (param $1 i32) (param $2 i32) (param $3 i32) (result i32)
   block $2of2
@@ -32395,7 +32395,7 @@
   local.get $1
   call $~lib/array/Array<u8>#join
  )
- (func $~lib/array/Array<~lib/string/String>#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
+ (func $std/array/ArrayStr#constructor@varargs (param $0 i32) (param $1 i32) (result i32)
   block $1of1
    block $0of1
     block $outOfRange
@@ -32409,7 +32409,7 @@
   end
   local.get $0
   local.get $1
-  call $~lib/array/Array<~lib/string/String>#constructor
+  call $std/array/ArrayStr#constructor
  )
  (func $~lib/array/Array<~lib/string/String>#fill@varargs (param $0 i32) (param $1 i32) (param $2 i32) (param $3 i32) (result i32)
   block $2of2