diff --git a/im-center-server/src/main/java/cn/axzo/im/group/GroupSupport.java b/im-center-server/src/main/java/cn/axzo/im/group/GroupSupport.java
index cf19205..343b6cc 100644
--- a/im-center-server/src/main/java/cn/axzo/im/group/GroupSupport.java
+++ b/im-center-server/src/main/java/cn/axzo/im/group/GroupSupport.java
@@ -42,8 +42,9 @@ public class GroupSupport implements GroupLogger {
         group.setAvatar(request.getAvatar());
         group.setMemberCount((long) request.getOwnerAndMembers().size());
         Long memberLimit = request.getMemberLimit();
-        group.setMemberLimit(memberLimit == null
-                ? groupProps.getDefaultMemberLimit() : memberLimit);
+        if (memberLimit == null)
+            memberLimit = (long)groupProps.getDefaultMemberLimit();
+        group.setMemberLimit(memberLimit);
         group.setOwnerAccount(owner);
         group.setOwnerPersonId(request.getOwner().personIdAsLong());
         group.setCreatePersonId(request.getOwner().personIdAsLong());