diff --git a/server/gameserver/zombiemode.ai.cc b/server/gameserver/zombiemode.ai.cc
index c6f8128..ca30ff8 100644
--- a/server/gameserver/zombiemode.ai.cc
+++ b/server/gameserver/zombiemode.ai.cc
@@ -176,7 +176,7 @@ void ZombieModeAI::UpdateThinking()
 void ZombieModeAI::UpdateAttack()
 {
     Human* myself = (Human*)owner;
-    if (hum->HasBuffEffect(kBET_Vertigo)) {
+    if (myself->HasBuffEffect(kBET_Vertigo)) {
         return;
     }
     if (!node_->target || node_->target->dead) {