diff --git a/src/server/scripts/EasternKingdoms/BastionOfTwilight/boss_ascendant_council.cpp b/src/server/scripts/EasternKingdoms/BastionOfTwilight/boss_ascendant_council.cpp
index 66982f7ef6..429e06bdd5 100644
--- a/src/server/scripts/EasternKingdoms/BastionOfTwilight/boss_ascendant_council.cpp
+++ b/src/server/scripts/EasternKingdoms/BastionOfTwilight/boss_ascendant_council.cpp
@@ -563,7 +563,7 @@ struct npc_feludius final : public ScriptedAI
 
     void DamageTaken(Unit* attacker, uint32& damage) override
     {
-        if (attacker->HasAura(SPELL_FLAME_IMBUED))
+        if (attacker && attacker->HasAura(SPELL_FLAME_IMBUED))
             damage *= 2;
 
         if (me->HealthBelowPctDamaged(25, damage))
@@ -731,7 +731,7 @@ struct npc_ignacious final : public ScriptedAI
 
     void DamageTaken(Unit* attacker, uint32& damage) override
     {
-        if (attacker->HasAura(SPELL_FROST_IMBUED))
+        if (attacker && attacker->HasAura(SPELL_FROST_IMBUED))
             damage *= 2;
 
         if (me->HealthBelowPctDamaged(25, damage))
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
index 35c39def21..9c9c9f9ca9 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
@@ -733,7 +733,7 @@ class boss_flame_leviathan_defense_turret : public CreatureScript
 
             void DamageTaken(Unit* who, uint32 &damage) override
             {
-                if (!CanAIAttack(who))
+                if (!who || !CanAIAttack(who))
                     damage = 0;
             }