diff --git a/Source/cmDynamicLoader.h b/Source/cmDynamicLoader.h
index ac2a88a5c..89e0c6f47 100644
--- a/Source/cmDynamicLoader.h
+++ b/Source/cmDynamicLoader.h
@@ -33,6 +33,9 @@
 #elif defined(_WIN32)
   #include <windows.h>
   typedef HMODULE cmLibHandle;
+#elif defined(__APPLE__)
+  #include <mach-o/dyld.h>
+  typedef NSModule cmLibHandle;
 #else
   typedef void* cmLibHandle;
 #endif