diff --git a/cmd/cgr-engine/cgr-engine.go b/cmd/cgr-engine/cgr-engine.go
index 42eed606a..048c09119 100644
--- a/cmd/cgr-engine/cgr-engine.go
+++ b/cmd/cgr-engine/cgr-engine.go
@@ -594,7 +594,7 @@ func main() {
 		writePid()
 	}
 	if *singlecpu {
-		runtime.GOMAXPROCS(1) // Having multiple cpus slows down computing due to CPU management, to be reviewed in future Go releases
+		runtime.GOMAXPROCS(1) // Having multiple cpus may slow down computing due to CPU management, to be reviewed in future Go releases
 	}
 	if *cpuprofile != "" {
 		f, err := os.Create(*cpuprofile)
diff --git a/engine/storage_utils.go b/engine/storage_utils.go
index da1292c3e..934e99378 100644
--- a/engine/storage_utils.go
+++ b/engine/storage_utils.go
@@ -41,6 +41,9 @@ func ConfigureRatingStorage(db_type, host, port, name, user, pass, marshaler str
 			host += ":" + port
 		}
 		d, err = NewRedisStorage(host, db_nb, pass, marshaler, utils.REDIS_MAX_CONNS)
+	case utils.MONGO:
+		d, err = NewMongoStorage(host, port, name, user, pass)
+		db = d.(RatingStorage)
 	default:
 		err = errors.New("unknown db")
 	}