diff --git a/lib/IRGen/GenCall.cpp b/lib/IRGen/GenCall.cpp
index 812982af2fe11..4dbcdeb177aee 100644
--- a/lib/IRGen/GenCall.cpp
+++ b/lib/IRGen/GenCall.cpp
@@ -4982,15 +4982,7 @@ void irgen::emitAsyncReturn(
     arguments.push_back(arg);
 
   Builder.CreateIntrinsicCall(llvm::Intrinsic::coro_end_async, arguments);
-
-  if (IGF.IGM.AsyncTailCallKind == llvm::CallInst::TCK_MustTail) {
-    Builder.CreateUnreachable();
-  } else {
-    // If target doesn't support musttail (e.g. WebAssembly), the function
-    // passed to coro.end.async can return control back to the caller.
-    // So use ret void instead of unreachable to allow it.
-    Builder.CreateRetVoid();
-  }
+  Builder.CreateUnreachable();
 }
 
 void irgen::emitAsyncReturn(IRGenFunction &IGF, AsyncContextLayout &asyncLayout,
diff --git a/test/IRGen/async/non_musttail_target.sil b/test/IRGen/async/non_musttail_target.sil
deleted file mode 100644
index 5907c237f51b6..0000000000000
--- a/test/IRGen/async/non_musttail_target.sil
+++ /dev/null
@@ -1,17 +0,0 @@
-// Ensure that IRGen don't emit unreachable after coro.end.async for targets that don't support musttail call.
-// RUN: %swift -disable-legacy-type-info -parse-stdlib -target wasm32-unknown-wasi %s -disable-llvm-optzns -disable-swift-specific-llvm-optzns -disable-objc-interop -module-name main -emit-ir -o - | %FileCheck %s
-// REQUIRES: concurrency
-// REQUIRES: CODEGENERATOR=WebAssembly
-
-sil_stage canonical
-
-import Builtin
-
-sil @test_simple : $@async () -> () {
-bb0:
-  %0 = tuple ()
-  return %0 : $()
-// CHECK:     call i1 (i8*, i1, ...) @llvm.coro.end.async
-// CHECK-NOT: unreachable
-// CHECK:     ret void
-}