diff --git a/wxPython/contrib/gizmos/wxCode/src/treelistctrl.cpp b/wxPython/contrib/gizmos/wxCode/src/treelistctrl.cpp
index 1c0f6066e1..c178ad47eb 100644
--- a/wxPython/contrib/gizmos/wxCode/src/treelistctrl.cpp
+++ b/wxPython/contrib/gizmos/wxCode/src/treelistctrl.cpp
@@ -40,6 +40,7 @@
 #include <wx/dcscreen.h>
 #include <wx/scrolwin.h>
 #include <wx/renderer.h>
+#include <wx/dcmemory.h>
 
 #include "wx/treelistctrl.h"