diff --git a/src/GuildTaskMgr.cpp b/src/GuildTaskMgr.cpp
index 37589ebd..8fb4711d 100644
--- a/src/GuildTaskMgr.cpp
+++ b/src/GuildTaskMgr.cpp
@@ -1067,7 +1067,7 @@ void GuildTaskMgr::SendCompletionMessage(Player* player, std::string const verb)
 void GuildTaskMgr::CheckKillTaskInternal(Player* player, Unit* victim)
 {
     ObjectGuid::LowType owner = player->GetGUID().GetCounter();
-    if (victim->IsCreature())
+    if (!victim->IsCreature())
         return;
 
     Creature* creature = reinterpret_cast<Creature*>(victim);