diff --git a/server/gameserver/incubator.cc b/server/gameserver/incubator.cc
index 2b199073..000139f6 100644
--- a/server/gameserver/incubator.cc
+++ b/server/gameserver/incubator.cc
@@ -320,7 +320,7 @@ void Incubator::SpawnWaveMon(int wave)
 
 int Incubator::GetPveLeftTime()
 {
-    if (room->pve_data.wave > wave_timers_.size() ||
+    if (room->pve_data.wave >= wave_timers_.size() ||
         room->pve_data.wave < 0) {
         return 0;
     }