diff --git a/src/game/WorldHandlers/Spell.cpp b/src/game/WorldHandlers/Spell.cpp
index 607fd4a6..43f421f5 100644
--- a/src/game/WorldHandlers/Spell.cpp
+++ b/src/game/WorldHandlers/Spell.cpp
@@ -722,7 +722,7 @@ void Spell::prepareDataForTriggerSystem()
     // avoid triggering negative hit for only positive targets
     m_negativeEffectMask = 0x0;
     for (int i = 0; i < MAX_EFFECT_INDEX; ++i)
-        if (!IsPositiveEffect(m_spellInfo, SpellEffectIndex(i)))
+        if (m_spellInfo->Effect[i] != SPELL_EFFECT_NONE && !IsPositiveEffect(m_spellInfo, SpellEffectIndex(i)))
             { m_negativeEffectMask |= (1 << i); }
 
     // Hunter traps spells (for Entrapment trigger)