diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/SecurityGroup.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/SecurityGroup.java
index 9ec1dc6..33ddcbf 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/SecurityGroup.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/SecurityGroup.java
@@ -52,7 +52,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(securityGroup);
+        return securityGroup.hashCode();
     }
 
     @Override