diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index d5e66c75643..29fd8465431 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -1478,15 +1478,18 @@ uint32 Unit::CalcArmorReducedDamage(Unit* pVictim, const uint32 damage)
     // Ignore enemy armor by SPELL_AURA_MOD_TARGET_RESISTANCE aura
     armor += GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_TARGET_RESISTANCE, SPELL_SCHOOL_MASK_NORMAL);
 
-    if (armor<0.0f) armor=0.0f;
-
-    float tmpvalue = 0.0f;
-    if(getLevel() <= 59)                                    //Level 1-59
-        tmpvalue = armor / (armor + 400.0f + 85.0f * getLevel());
-    else if(getLevel() < 70)                                //Level 60-69
-        tmpvalue = armor / (armor - 22167.5f + 467.5f * getLevel());
-    else                                                    //Level 70+
-        tmpvalue = armor / (armor + 10557.5f);
+    // Apply Player CR_ARMOR_PENETRATION rating
+    if (GetTypeId()==TYPEID_PLAYER)
+        armor *= 1.0f - ((Player*)this)->GetRatingBonusValue(CR_ARMOR_PENETRATION) / 100.0f;
+
+    if (armor < 0.0f) armor=0.0f;
+
+    float levelModifier = getLevel();
+    if ( levelModifier > 59 )
+        levelModifier = levelModifier + (4.5f * (levelModifier-59));
+
+    float tmpvalue = 0.1f * armor / (8.5f * levelModifier + 40);
+    tmpvalue = tmpvalue/(1.0f + tmpvalue);
 
     if(tmpvalue < 0.0f)
         tmpvalue = 0.0f;
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 84eeb9352de..29a6d38dd8d 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 "6945"
+ #define REVISION_NR "6946"
 #endif // __REVISION_NR_H__