diff --git a/src/ribbon/art_aui.cpp b/src/ribbon/art_aui.cpp
index 39715c47b9..6a5df2529d 100644
--- a/src/ribbon/art_aui.cpp
+++ b/src/ribbon/art_aui.cpp
@@ -34,6 +34,8 @@
 #include "wx/msw/private.h"
 #elif defined(__WXMAC__)
 #include "wx/osx/private.h"
+// only for kThemeBrushToolbarBackground
+#include <Carbon/Carbon.h>
 #endif
 
 wxRibbonAUIArtProvider::wxRibbonAUIArtProvider()