diff --git a/server/src/com/cloud/vm/UserVmManagerImpl.java b/server/src/com/cloud/vm/UserVmManagerImpl.java
index 65dbc5eb4e8..9895f52e7a0 100755
--- a/server/src/com/cloud/vm/UserVmManagerImpl.java
+++ b/server/src/com/cloud/vm/UserVmManagerImpl.java
@@ -2037,8 +2037,10 @@ public class UserVmManagerImpl implements UserVmManager, UserVmService, Manager
         
         if (securityGroupIdList != null && isVmWare) {
             throw new InvalidParameterValueException("Security group feature is not supported for vmWare hypervisor");
-        } else if (securityGroupIdList == null && !isVmWare) {
-            securityGroupIdList = new ArrayList<Long>();
+        } else if (!isVmWare) {
+            if (securityGroupIdList == null) {
+                securityGroupIdList = new ArrayList<Long>();
+            }
             SecurityGroup defaultGroup = _securityGroupMgr.getDefaultSecurityGroup(owner.getId());
             if (defaultGroup != null) {
               //check if security group id list already contains Default security group, and if not - add it