diff --git a/gtk/gtkclipboard-quartz.c b/gtk/gtkclipboard-quartz.c
index 046fe71ccf..71adfa96a9 100644
--- a/gtk/gtkclipboard-quartz.c
+++ b/gtk/gtkclipboard-quartz.c
@@ -40,6 +40,7 @@ enum {
 
 @interface GtkClipboardOwner : NSObject {
   GtkClipboard *clipboard;
+  @public
   gboolean setting_same_owner;
 }