diff --git a/obj.go b/obj.go
index 45500d6..4bb9c1b 100644
--- a/obj.go
+++ b/obj.go
@@ -28,7 +28,7 @@ var (
 func initCache() {
 
 	resetMsgParsingRules()
-	msgParsingRules, err = loadMsgParsingRules()
+	msgParsingRules, err := loadMsgParsingRules()
 	logOnError(err, "initCache : message parsing rules")
 
 	err = loadObjCastle()