Index: pbx/pbx_loopback.c
===================================================================
--- pbx/pbx_loopback.c	(revision 89277)
+++ pbx/pbx_loopback.c	(working copy)
@@ -176,8 +176,9 @@
 
 static int load_module(void)
 {
-	ast_register_switch(&loopback_switch);
-	return 0;
+	if (ast_register_switch(&loopback_switch))
+		return AST_MODULE_LOAD_FAILURE;
+	return AST_MODULE_LOAD_SUCCESS;
 }
 
 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Loopback Switch");