diff --git a/gtk/gtkplug.c b/gtk/gtkplug.c
index 336b99f5c9..352b03db66 100644
--- a/gtk/gtkplug.c
+++ b/gtk/gtkplug.c
@@ -257,7 +257,7 @@ _gtk_plug_add_to_socket (GtkPlug   *plug,
 
   gtk_widget_set_parent (widget, GTK_WIDGET (socket_));
 
-  g_signal_emit_by_name (socket, "plug_added");
+  g_signal_emit_by_name (socket_, "plug_added");
 }
 
 /**