diff --git a/src/server/game/Globals/ObjectMgr.cpp b/src/server/game/Globals/ObjectMgr.cpp
index 3672d4555f..3d56225bc0 100644
--- a/src/server/game/Globals/ObjectMgr.cpp
+++ b/src/server/game/Globals/ObjectMgr.cpp
@@ -1412,6 +1412,11 @@ bool ObjectMgr::SetCreatureLinkedRespawn(uint32 guidLow, uint32 linkedGuidLow)
     }
 
     const CreatureData* slave = GetCreatureData(linkedGuidLow);
+    if (!slave)
+    {
+        TC_LOG_ERROR("sql.sql", "Creature '%u' linking to non-existent creature '%u'.", guidLow, linkedGuidLow);
+        return false;
+    }
 
     const MapEntry* const map = sMapStore.LookupEntry(master->mapid);
     if (!map || !map->Instanceable() || (master->mapid != slave->mapid))