diff --git a/src/gtk/display.cpp b/src/gtk/display.cpp
index 265b692063..9616eb2eb1 100644
--- a/src/gtk/display.cpp
+++ b/src/gtk/display.cpp
@@ -18,6 +18,7 @@
 #ifdef GDK_WINDOWING_X11
     #include <gdk/gdkx.h>
 #endif
+#include "wx/gtk/private/gtk2-compat.h"
 
 GtkWidget* wxGetRootWindow();