diff --git a/gtk/gtkcombobox.c b/gtk/gtkcombobox.c
index bd83a1e11..417799535 100644
--- a/gtk/gtkcombobox.c
+++ b/gtk/gtkcombobox.c
@@ -651,18 +651,19 @@ gtk_combo_box_class_init (GtkComboBoxClass *klass)
   /* key bindings */
   binding_set = gtk_binding_set_by_class (widget_class);
 
-  gtk_binding_entry_add_signal (binding_set, GDK_Down, GDK_MOD1_MASK,
+  gtk_binding_entry_add_signal (binding_set, GDK_Down, 0,
 				"popup", 0);
-  gtk_binding_entry_add_signal (binding_set, GDK_KP_Down, GDK_MOD1_MASK,
+  gtk_binding_entry_add_signal (binding_set, GDK_KP_Down, 0,
 				"popup", 0);
 
-  gtk_binding_entry_add_signal (binding_set, GDK_Up, GDK_MOD1_MASK,
-				"popdown", 0);
-  gtk_binding_entry_add_signal (binding_set, GDK_KP_Up, GDK_MOD1_MASK,
-				"popdown", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_Up, 0,
+				"popup", 0);
+  gtk_binding_entry_add_signal (binding_set, GDK_KP_Up, 0,
+				"popup", 0);
   gtk_binding_entry_add_signal (binding_set, GDK_Escape, 0,
 				"popdown", 0);
 
+#if 0
   gtk_binding_entry_add_signal (binding_set, GDK_Up, 0,
 				"move-active", 1,
 				GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_STEP_UP);
@@ -700,7 +701,7 @@ gtk_combo_box_class_init (GtkComboBoxClass *klass)
   gtk_binding_entry_add_signal (binding_set, GDK_KP_End, 0,
 				"move-active", 1,
 				GTK_TYPE_SCROLL_TYPE, GTK_SCROLL_END);
-
+#endif
   /* properties */
   g_object_class_override_property (object_class,
                                     PROP_EDITING_CANCELED,