diff --git a/include/wx/gtk/clrpicker.h b/include/wx/gtk/clrpicker.h
index 1ddbfe3b18..1921288277 100644
--- a/include/wx/gtk/clrpicker.h
+++ b/include/wx/gtk/clrpicker.h
@@ -12,6 +12,8 @@
 #ifndef _WX_GTK_CLRPICKER_H_
 #define _WX_GTK_CLRPICKER_H_
 
+#include "wx/button.h"
+
 //-----------------------------------------------------------------------------
 // wxColourButton
 //-----------------------------------------------------------------------------
diff --git a/include/wx/gtk/fontpicker.h b/include/wx/gtk/fontpicker.h
index 2bb9c8e103..80376e5de8 100644
--- a/include/wx/gtk/fontpicker.h
+++ b/include/wx/gtk/fontpicker.h
@@ -12,6 +12,8 @@
 #ifndef _WX_GTK_FONTPICKER_H_
 #define _WX_GTK_FONTPICKER_H_
 
+#include "wx/button.h"
+
 //-----------------------------------------------------------------------------
 // wxFontButton
 //-----------------------------------------------------------------------------