diff --git a/src/server/scripts/Spells/spell_dk.cpp b/src/server/scripts/Spells/spell_dk.cpp
index 36dcb53ad0053..7a4b8f273d2ca 100644
--- a/src/server/scripts/Spells/spell_dk.cpp
+++ b/src/server/scripts/Spells/spell_dk.cpp
@@ -381,6 +381,7 @@ class spell_dk_scourge_strike : public SpellScriptLoader
         class spell_dk_scourge_strike_SpellScript : public SpellScript
         {
             PrepareSpellScript(spell_dk_scourge_strike_SpellScript);
+            float multiplier;
 
             bool Validate(SpellInfo const* /*spellEntry*/)
             {
@@ -390,11 +391,18 @@ class spell_dk_scourge_strike : public SpellScriptLoader
             }
 
             void HandleDummy(SpellEffIndex /*effIndex*/)
+            {
+                Unit* caster = GetCaster();
+                if (Unit* unitTarget = GetHitUnit())
+                    multiplier = (GetEffectValue() * unitTarget->GetDiseasesByCaster(caster->GetGUID()) / 100.f);
+            }
+
+            void HandleAfterHit()
             {
                 Unit* caster = GetCaster();
                 if (Unit* unitTarget = GetHitUnit())
                 {
-                    int32 bp = CalculatePctN(GetHitDamage(), GetEffectValue() * unitTarget->GetDiseasesByCaster(caster->GetGUID()));
+                    int32 bp = GetHitDamage() * multiplier;
                     caster->CastCustomSpell(unitTarget, DK_SPELL_SCOURGE_STRIKE_TRIGGERED, &bp, NULL, NULL, true);
                 }
             }
@@ -402,6 +410,7 @@ class spell_dk_scourge_strike : public SpellScriptLoader
             void Register()
             {
                 OnEffectHitTarget += SpellEffectFn(spell_dk_scourge_strike_SpellScript::HandleDummy, EFFECT_2, SPELL_EFFECT_DUMMY);
+                AfterHit += SpellHitFn(spell_dk_scourge_strike_SpellScript::HandleAfterHit);
             }
         };