diff --git a/server/gameserver/team.cc b/server/gameserver/team.cc
index ddd25aa0..43c41b43 100644
--- a/server/gameserver/team.cc
+++ b/server/gameserver/team.cc
@@ -88,6 +88,10 @@ bool Team::HasAliveMember()
 
 void Team::AddMember(Human* member)
 {
+    if (room->GetMapModeMeta()->mapMode() == mt::kCircuitMatchMode &&
+        !members_.empty()) {
+        A8_ABORT();
+    }
     if (!first_member_) {
         first_member_ = member;
         init_team_member_num_ = member->init_team_member_num;