diff --git a/src/game/SpellEffects.cpp b/src/game/SpellEffects.cpp
index 46c5d75a3..2eff38aa0 100644
--- a/src/game/SpellEffects.cpp
+++ b/src/game/SpellEffects.cpp
@@ -2226,7 +2226,20 @@ void Spell::EffectDummy(SpellEffectIndex eff_idx)
                     }
                 }
 
-                int32 bp = int32(count * m_caster->GetMaxHealth() * m_spellInfo->DmgMultiplier[0] / 100);
+                int32 bp = int32(count * m_caster->GetMaxHealth() * m_spellInfo->DmgMultiplier[EFFECT_INDEX_0] / 100);
+
+                // Improved Death Strike (percent stored in not existed EFFECT_INDEX_2 effect base points)
+                Unit::AuraList const& auraMod = m_caster->GetAurasByType(SPELL_AURA_ADD_FLAT_MODIFIER);
+                for(Unit::AuraList::const_iterator iter = auraMod.begin(); iter != auraMod.end(); ++iter)
+                {
+                    // only required spell have spellicon for SPELL_AURA_ADD_FLAT_MODIFIER
+                    if ((*iter)->GetSpellProto()->SpellIconID == 2751 && (*iter)->GetSpellProto()->SpellFamilyName == SPELLFAMILY_DEATHKNIGHT)
+                    {
+                        bp += (*iter)->GetSpellProto()->CalculateSimpleValue(EFFECT_INDEX_2) * bp / 100;
+                        break;
+                    }
+                }
+
                 m_caster->CastCustomSpell(m_caster, 45470, &bp, NULL, NULL, true);
                 return;
             }
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index ddc8f08da..fe28e11eb 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "9452"
+ #define REVISION_NR "9453"
 #endif // __REVISION_NR_H__