diff --git a/include/wx/bitmap.h b/include/wx/bitmap.h
index c65f419f7e..4a1d3b0296 100644
--- a/include/wx/bitmap.h
+++ b/include/wx/bitmap.h
@@ -23,13 +23,14 @@
 #include "wx/defs.h"
 #include "wx/object.h"
 #include "wx/string.h"
-#include "wx/palette.h"
 #include "wx/gdiobj.h"
+#include "wx/gdicmn.h"  // for wxBitmapType
 
-class WXDLLEXPORT wxImage;
-class WXDLLEXPORT wxMask;
 class WXDLLEXPORT wxBitmap;
 class WXDLLEXPORT wxBitmapHandler;
+class WXDLLEXPORT wxImage;
+class WXDLLEXPORT wxMask;
+class WXDLLEXPORT wxPalette;
 
 // ----------------------------------------------------------------------------
 // wxBitmapHandler: class which knows how to create/load/save bitmaps in
diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index d81d01c970..30fa4db6fa 100644
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -11,6 +11,9 @@
 #pragma implementation "bitmap.h"
 #endif
 
+#include "wx/defs.h"
+
+#include "wx/palette.h"
 #include "wx/bitmap.h"
 #include "wx/icon.h"
 #include "wx/filefn.h"
diff --git a/src/gtk1/bitmap.cpp b/src/gtk1/bitmap.cpp
index d81d01c970..30fa4db6fa 100644
--- a/src/gtk1/bitmap.cpp
+++ b/src/gtk1/bitmap.cpp
@@ -11,6 +11,9 @@
 #pragma implementation "bitmap.h"
 #endif
 
+#include "wx/defs.h"
+
+#include "wx/palette.h"
 #include "wx/bitmap.h"
 #include "wx/icon.h"
 #include "wx/filefn.h"