diff --git a/src/BlocksRuntime/CMakeLists.txt b/src/BlocksRuntime/CMakeLists.txt
index 3732b0aec..aa679303b 100644
--- a/src/BlocksRuntime/CMakeLists.txt
+++ b/src/BlocksRuntime/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-add_library(BlocksRuntime
+add_library(BlocksRuntime SHARED
   data.c
   runtime.c)
 if(WIN32)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b436454e9..b7c444bd8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-add_library(dispatch
+add_library(dispatch SHARED
   allocator.c
   apply.c
   benchmark.c