diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 78aaa936..92ff2c46 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -2298,6 +2298,8 @@ long long Room::GetGasInactiveTime()
         inactive_time = 12;
     }
 #endif
+    inactive_time = std::max((long long)0, inactive_time - acc_inactive_time_);
+    return inactive_time;
 }
 
 long long Room::GetGasInactiveReaminTime()