diff --git a/src/shell-app-system.c b/src/shell-app-system.c
index a4061cb2f..108b616c4 100644
--- a/src/shell-app-system.c
+++ b/src/shell-app-system.c
@@ -64,8 +64,8 @@ static void shell_app_system_class_init(ShellAppSystemClass *klass)
     g_signal_new ("installed-changed",
 		  SHELL_TYPE_APP_SYSTEM,
 		  G_SIGNAL_RUN_LAST,
-		  G_STRUCT_OFFSET (ShellAppSystemClass, installed_changed),
-          NULL, NULL, NULL,
+                  0,
+                  NULL, NULL, NULL,
 		  G_TYPE_NONE, 0);
 }
 
diff --git a/src/shell-app-system.h b/src/shell-app-system.h
index 16a2c550f..f9ed003cb 100644
--- a/src/shell-app-system.h
+++ b/src/shell-app-system.h
@@ -29,9 +29,6 @@ struct _ShellAppSystem
 struct _ShellAppSystemClass
 {
   GObjectClass parent_class;
-
-  void (*installed_changed)(ShellAppSystem *appsys, gpointer user_data);
-  void (*favorites_changed)(ShellAppSystem *appsys, gpointer user_data);
 };
 
 GType           shell_app_system_get_type    (void) G_GNUC_CONST;
diff --git a/src/shell-tray-manager.c b/src/shell-tray-manager.c
index cc2519a02..5fe165ebe 100644
--- a/src/shell-tray-manager.c
+++ b/src/shell-tray-manager.c
@@ -152,7 +152,7 @@ shell_tray_manager_class_init (ShellTrayManagerClass *klass)
     g_signal_new ("tray-icon-added",
                   G_TYPE_FROM_CLASS (klass),
                   G_SIGNAL_RUN_LAST,
-                  G_STRUCT_OFFSET (ShellTrayManagerClass, tray_icon_added),
+                  0,
                   NULL, NULL, NULL,
                   G_TYPE_NONE, 1,
                   CLUTTER_TYPE_ACTOR);
@@ -160,7 +160,7 @@ shell_tray_manager_class_init (ShellTrayManagerClass *klass)
     g_signal_new ("tray-icon-removed",
                   G_TYPE_FROM_CLASS (klass),
                   G_SIGNAL_RUN_LAST,
-                  G_STRUCT_OFFSET (ShellTrayManagerClass, tray_icon_removed),
+                  0,
                   NULL, NULL, NULL,
                   G_TYPE_NONE, 1,
                   CLUTTER_TYPE_ACTOR);
diff --git a/src/shell-tray-manager.h b/src/shell-tray-manager.h
index f19167aef..0f281dcf4 100644
--- a/src/shell-tray-manager.h
+++ b/src/shell-tray-manager.h
@@ -29,13 +29,6 @@ struct _ShellTrayManager
 struct _ShellTrayManagerClass
 {
   GObjectClass parent_class;
-
-  void (* tray_icon_added)   (ShellTrayManager *manager,
-			      ClutterActor     *icon,
-			      const char       *lowercase_wm_class);
-  void (* tray_icon_removed) (ShellTrayManager *manager,
-			      ClutterActor     *icon);
-
 };
 
 GType             shell_tray_manager_get_type     (void);