diff --git a/src/server/game/Conditions/ConditionMgr.h b/src/server/game/Conditions/ConditionMgr.h
index 828a818a561..807b75c4ee6 100644
--- a/src/server/game/Conditions/ConditionMgr.h
+++ b/src/server/game/Conditions/ConditionMgr.h
@@ -244,7 +244,7 @@ class ConditionMgr
         ConditionList GetConditionsForSpellClickEvent(uint32 creatureId, uint32 spellId);
         ConditionList GetConditionsForSmartEvent(int32 entryOrGuid, uint32 eventId, uint32 sourceType);
         ConditionList GetConditionsForVehicleSpell(uint32 creatureId, uint32 spellId);
-        ConditionList GetConditionsForNpcVendorEvent(uint32 creatureId, uint32 spellId);
+        ConditionList GetConditionsForNpcVendorEvent(uint32 creatureId, uint32 itemId);
 
     private:
         bool isSourceTypeValid(Condition* cond);