diff --git a/server/gameserver/matchteam.cc b/server/gameserver/matchteam.cc
index 0822024f..71d12a47 100644
--- a/server/gameserver/matchteam.cc
+++ b/server/gameserver/matchteam.cc
@@ -292,11 +292,11 @@ void MatchTeam::UpdateMaster()
     case kMatchCombining:
         {
             if (IsShuaRobotTime()) {
-                if (curr_member_hash_.size() < GetSlotNum()) {
+                if (HaveEmptySlot()) {
                     ShuaRobot();
                 }
             } else {
-                if (GetPredictMemberNum() < GetSlotNum()) {
+                if (HaveEmptySlot()) {
                     TryCombineTeam();
                 }
             }