diff --git a/src/aui/auibar.cpp b/src/aui/auibar.cpp
index 3ea18923d5..da42c3bc42 100644
--- a/src/aui/auibar.cpp
+++ b/src/aui/auibar.cpp
@@ -38,6 +38,8 @@
 
 #ifdef __WXMAC__
 #include "wx/osx/private.h"
+// for themeing support
+#include <Carbon/Carbon.h>
 #endif
 
 #include "wx/arrimpl.cpp"