diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index ebc887c..5db96d0 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -2246,7 +2246,7 @@ ObstacleData* Room::GetPermanentObstacleData(int obstacle_uniid)
 
 long long Room::GetGasInactiveTime()
 {
-#if DEBUG
+#ifdef DEBUG
     return 5;
 #endif
     if (room_mode_ == kZombieMode) {