diff --git a/gtk/gtkimmulticontext.c b/gtk/gtkimmulticontext.c
index 50363559d7..2d70cdeda0 100644
--- a/gtk/gtkimmulticontext.c
+++ b/gtk/gtkimmulticontext.c
@@ -282,7 +282,8 @@ gtk_im_multicontext_get_slave (GtkIMMulticontext *multicontext)
 }
 
 static void
-im_module_setting_changed (GtkSettings       *settings, 
+im_module_setting_changed (GtkSettings       *settings,
+                           GParamSpec        *pspec,
                            GtkIMMulticontext *self)
 {
   gtk_im_multicontext_set_slave (self, NULL, FALSE);