diff --git a/gnoemoe/widgets/gm-world-tab.c b/gnoemoe/widgets/gm-world-tab.c
index cd75330..e96ec6e 100644
--- a/gnoemoe/widgets/gm-world-tab.c
+++ b/gnoemoe/widgets/gm-world-tab.c
@@ -8,9 +8,9 @@
 #define GM_WORLD_TAB_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE((object),	GM_TYPE_WORLD_TAB, GmWorldTabPrivate))
 
 void on_gm_world_tab_button_clicked(GtkButton *button, GmWorldTab *tab);
-void on_gm_world_tab_world_activity_changed(GmWorld *world, gint activity,
+void on_gm_world_tab_world_activity_changed(GmWorld *world, GParamSpec *pspec,
 		GmWorldTab *tab);
-void on_gm_world_tab_world_name_changed(GmWorld *world, gchar *text,
+void on_gm_world_tab_world_name_changed(GmWorld *world, GParamSpec *pspec,
 		GmWorldTab *tab);
 
 struct _GmWorldTabPrivate {
@@ -167,9 +167,9 @@ gm_world_tab_new(GmWorld *world) {
 	
 	obj->priv->world = g_object_ref(world);
 
-	g_signal_connect(world, "activity_changed",
+	g_signal_connect(world, "notify::activity",
 			G_CALLBACK(on_gm_world_tab_world_activity_changed), obj);
-	g_signal_connect(world, "name_changed",
+	g_signal_connect(world, "notify::name",
 			G_CALLBACK(on_gm_world_tab_world_name_changed), obj);
 
 	gm_world_tab_update(obj);
@@ -184,13 +184,13 @@ on_gm_world_tab_button_clicked(GtkButton *button, GmWorldTab *tab) {
 }
 
 void
-on_gm_world_tab_world_activity_changed(GmWorld *world, gint activity, 
+on_gm_world_tab_world_activity_changed(GmWorld *world, GParamSpec *pspec, 
 		GmWorldTab *tab) {
 	gm_world_tab_update(tab);
 }
 
 void
-on_gm_world_tab_world_name_changed(GmWorld *world, gchar *text, 
+on_gm_world_tab_world_name_changed(GmWorld *world, GParamSpec *pspec, 
 		GmWorldTab *tab) {
 	gm_world_tab_update(tab);
 }