diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index b50131ce6df..cb39caa6db4 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -7821,7 +7821,7 @@ bool Unit::IsImmunedToSpell(SpellInfo const* spellInfo, uint32 effectMask, World
                 if (!immuneSpellInfo || !immuneSpellInfo->HasAttribute(SPELL_ATTR1_IMMUNITY_PURGES_EFFECT))
                     continue;
 
-            if ((spellInfo->NegativeEffects & std::bitset<MAX_SPELL_EFFECTS>(effectMask)).none() && !(immuneSpellInfo && immuneSpellInfo->HasAttribute(SPELL_ATTR1_IMMUNITY_TO_HOSTILE_AND_FRIENDLY_EFFECTS)))
+            if (!(spellInfo->NegativeEffects.to_ulong() & effectMask) && !(immuneSpellInfo && immuneSpellInfo->HasAttribute(SPELL_ATTR1_IMMUNITY_TO_HOSTILE_AND_FRIENDLY_EFFECTS)))
                 continue;
 
             if (spellInfo->CanPierceImmuneAura(immuneSpellInfo))