diff --git a/src/osgPlugins/osc/CMakeLists.txt b/src/osgPlugins/osc/CMakeLists.txt
index e8c95b70a..74cd9a7f2 100755
--- a/src/osgPlugins/osc/CMakeLists.txt
+++ b/src/osgPlugins/osc/CMakeLists.txt
@@ -35,7 +35,7 @@ if(WIN32)
         ip/win32/NetworkingUtils.cpp 
         ip/win32/UdpSocket.cpp
     )
-    SET(TARGET_EXTERNAL_LIBRARIES ${TARGET_EXTERNAL_LIBRARIES} "Ws2_32.lib winmm")
+    SET(TARGET_EXTERNAL_LIBRARIES "${TARGET_EXTERNAL_LIBRARIES};Ws2_32.lib;winmm")
 ELSE()
     SET(TARGET_SRC
         ${TARGET_SRC}