diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index b95d149b..d27589ae 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -1515,6 +1515,10 @@ void Room::CombineTeam()
         return;
     }
 
+    if (need_combine_teams.size() < 2) {
+        return;
+    }
+
     size_t first_team_num = 4;
     switch (total_count) {
     case 3: