diff --git a/server/gameserver/playermgr.cc b/server/gameserver/playermgr.cc
index 8bec087..b9087f1 100644
--- a/server/gameserver/playermgr.cc
+++ b/server/gameserver/playermgr.cc
@@ -177,6 +177,8 @@ void PlayerMgr::DecAccountNum(const std::string& account_id)
                   itr->second
                  }
                  );
+        }
+        if (itr->second <= 0) {
             account_num_hash_.erase(itr);
         }
     } else {