diff --git a/gtk/gtkquartz.c b/gtk/gtkquartz.c
index 5b440e4b41..d691f7f254 100644
--- a/gtk/gtkquartz.c
+++ b/gtk/gtkquartz.c
@@ -21,6 +21,7 @@
 #include "config.h"
 
 #include "gtkquartz.h"
+#include "gtkselectionprivate.h"
 #include <gdk/quartz/gdkquartz.h>
 
 NSImage *