diff --git a/src/dataobj/metric.go b/src/dataobj/metric.go
index 8a8c02d2..825dcdaf 100644
--- a/src/dataobj/metric.go
+++ b/src/dataobj/metric.go
@@ -87,7 +87,7 @@ func (m *MetricValue) CheckValidity(now int64) (err error) {
 		m.CounterType = GAUGE
 	}
 
-	if m.CounterType != GAUGE && m.CounterType != COUNTER {
+	if m.CounterType != GAUGE && m.CounterType != COUNTER && m.CounterType != SUBTRACT {
 		err = fmt.Errorf("wrong counter type")
 		return
 	}