diff --git a/include/wx/mac/carbon/config_xcode.h b/include/wx/mac/carbon/config_xcode.h
index 9f341fa8c2..ed53444e2f 100644
--- a/include/wx/mac/carbon/config_xcode.h
+++ b/include/wx/mac/carbon/config_xcode.h
@@ -87,7 +87,6 @@
 #if __BIG_ENDIAN__
 #define WORDS_BIGENDIAN 1
 #endif
-#define WXWIN_COMPATIBILITY_2_4 1
 #define WXWIN_OS_DESCRIPTION "Darwin 7.3.0 Power Macintosh"
 #define WX_GMTOFF_IN_TM 1
 #define WX_NO_REGEX_ADVANCED 1