diff --git a/samples/aui/auidemo.cpp b/samples/aui/auidemo.cpp
index 6beeb3f36f..50f8957f35 100644
--- a/samples/aui/auidemo.cpp
+++ b/samples/aui/auidemo.cpp
@@ -27,6 +27,7 @@
 #include "wx/colordlg.h"
 #include "wx/wxhtml.h"
 #include "wx/imaglist.h"
+#include "wx/dataobj.h"
 
 #include "wx/aui/aui.h"
 #include "../sample.xpm"