diff --git a/metrics/metrics-prometheus/src/main/java/com/alipay/sofa/rpc/metrics/prometheus/SofaRpcMetricsCollector.java b/metrics/metrics-prometheus/src/main/java/com/alipay/sofa/rpc/metrics/prometheus/SofaRpcMetricsCollector.java
index 4c872bbc6..2a5171a3d 100644
--- a/metrics/metrics-prometheus/src/main/java/com/alipay/sofa/rpc/metrics/prometheus/SofaRpcMetricsCollector.java
+++ b/metrics/metrics-prometheus/src/main/java/com/alipay/sofa/rpc/metrics/prometheus/SofaRpcMetricsCollector.java
@@ -200,9 +200,9 @@ public void close() throws Exception {
         EventBus.unRegister(ConsumerSubEvent.class, subscriber);
     }
 
-    private static Long getLongAvoidNull(Object object) {
+    private static long getLongAvoidNull(Object object) {
         if (object == null) {
-            return null;
+            return 0L;
         }
 
         if (object instanceof Integer) {