diff --git a/include/wx/bitmap.h b/include/wx/bitmap.h
index 0b5da2e630..e2431b9e53 100644
--- a/include/wx/bitmap.h
+++ b/include/wx/bitmap.h
@@ -21,6 +21,7 @@
 #include "wx/string.h"
 #include "wx/gdiobj.h"
 #include "wx/gdicmn.h"  // for wxBitmapType
+#include "wx/colour.h"
 
 class WXDLLEXPORT wxBitmap;
 class WXDLLEXPORT wxBitmapHandler;