diff --git a/tests/misc/guifuncs.cpp b/tests/misc/guifuncs.cpp
index 6523b2bbba..e63835d92f 100644
--- a/tests/misc/guifuncs.cpp
+++ b/tests/misc/guifuncs.cpp
@@ -28,6 +28,7 @@
 #include "wx/button.h"
 #include "wx/clipbrd.h"
 #include "wx/dataobj.h"
+#include "wx/panel.h"
 
 #include "asserthelper.h"