diff --git a/src/osgViewer/CMakeLists.txt b/src/osgViewer/CMakeLists.txt
index 76d323525..1c70e41e8 100644
--- a/src/osgViewer/CMakeLists.txt
+++ b/src/osgViewer/CMakeLists.txt
@@ -135,6 +135,7 @@ ELSE()
         )
 
         SET(LIB_EXTRA_LIBS ${COCOA_LIBRARY} ${LIB_EXTRA_LIBS})
+        SET(LIB_EXTRA_LIBS ${LIB_EXTRA_LIBS} "-framework AGL")
 
     ELSEIF(${OSG_WINDOWING_SYSTEM} STREQUAL "IOS")