diff --git a/Source/Game/Entities/Unit/Unit.Spells.cs b/Source/Game/Entities/Unit/Unit.Spells.cs
index 22545caf8..085740ae8 100644
--- a/Source/Game/Entities/Unit/Unit.Spells.cs
+++ b/Source/Game/Entities/Unit/Unit.Spells.cs
@@ -331,7 +331,7 @@ namespace Game.Entities
                     if ((aurEff.GetMiscValue() & (int)spellProto.GetSchoolMask()) == 0)
                         continue;
 
-                    MathFunctions.ApplyPct(ref damageReduction, aurEff.GetAmount());
+                    MathFunctions.AddPct(ref damageReduction, -aurEff.GetAmount());
                 }
 
                 TakenTotalMod = 1.0f - damageReduction;
diff --git a/Source/Game/Entities/Unit/Unit.cs b/Source/Game/Entities/Unit/Unit.cs
index 83ed2b8e2..dc9217a7c 100644
--- a/Source/Game/Entities/Unit/Unit.cs
+++ b/Source/Game/Entities/Unit/Unit.cs
@@ -4005,7 +4005,7 @@ namespace Game.Entities
                     if ((aurEff.GetMiscValue() & (int)attackSchoolMask) == 0)
                         continue;
 
-                    MathFunctions.ApplyPct(ref damageReduction, aurEff.GetAmount());
+                    MathFunctions.AddPct(ref damageReduction, -aurEff.GetAmount());
                 }
 
                 TakenTotalMod = 1.0f - damageReduction;