diff --git a/newton-4.00/CMakeLists.txt b/newton-4.00/CMakeLists.txt
index 32c9fbaae1..da0ed4a20a 100644
--- a/newton-4.00/CMakeLists.txt
+++ b/newton-4.00/CMakeLists.txt
@@ -77,6 +77,7 @@ endif(NOT CMAKE_BUILD_TYPE)
 #check for MAC
 if(APPLE)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fms-extensions")
+	set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS} -undefined dynamic_lookup")
 endif(APPLE)
 
 #check for UNIX