Index: formats/format_wav_gsm.c
===================================================================
--- formats/format_wav_gsm.c	(revision 87247)
+++ formats/format_wav_gsm.c	(working copy)
@@ -559,7 +559,9 @@
 
 static int load_module(void)
 {
-	return ast_format_register(&wav49_f);
+	if (ast_format_register(&wav49_f))
+		return AST_MODULE_LOAD_FAILURE;
+	return AST_MODULE_LOAD_SUCCESS;
 }
 
 static int unload_module(void)