Index: b/plugins/media-keys/gsd-media-keys-manager.c
===================================================================
--- a/plugins/media-keys/gsd-media-keys-manager.c
+++ b/plugins/media-keys/gsd-media-keys-manager.c
@@ -350,7 +350,7 @@ get_key_string (MediaKey *key)
 	else if (key->custom_path != NULL)
 		return g_strdup_printf ("custom:%s", key->custom_path);
 	else
-		g_assert_not_reached ();
+		return NULL;
 }
 
 static GStrv
@@ -392,7 +392,7 @@ get_bindings (GsdMediaKeysManager *manag
                                                 key->custom_path);
 		binding = g_settings_get_string (settings, "binding");
 	} else
-		g_assert_not_reached ();
+		return NULL;
 
         array = g_ptr_array_new ();
         g_ptr_array_add (array, binding);
Index: b/plugins/rfkill/rfkill-glib.c
===================================================================
--- a/plugins/rfkill/rfkill-glib.c
+++ b/plugins/rfkill/rfkill-glib.c
@@ -268,7 +268,7 @@ op_to_string (unsigned int op)
 	case RFKILL_OP_CHANGE_ALL:
 		return "CHANGE_ALL";
 	default:
-		g_assert_not_reached ();
+		return "NULL";
 	}
 }
 
Index: b/plugins/xsettings/xsettings-manager.c
===================================================================
--- a/plugins/xsettings/xsettings-manager.c
+++ b/plugins/xsettings/xsettings-manager.c
@@ -271,7 +271,7 @@ xsettings_get_typecode (GVariant *value)
     case G_VARIANT_CLASS_TUPLE:
       return XSETTINGS_TYPE_COLOR;
     default:
-      g_assert_not_reached ();
+      return NULL;
     }
 }