diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c7a994..4e1863c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -426,9 +426,9 @@ SET(AQUARIA_SRCS_UNUSED
 )
 
 IF(MACOSX)
-    IF(AQUARIA_USE_SDL)
+    IF(NOT AQUARIA_USE_SDL2)
         SET(COCOA_SRCS "${BBGEDIR}/Cocoa.mm")
-    ENDIF(AQUARIA_USE_SDL)
+    ENDIF(NOT AQUARIA_USE_SDL2)
 ENDIF(MACOSX)
 
 # Bit Blot Game Engine sources...