diff --git a/apps/openmw/mwmechanics/actors.cpp b/apps/openmw/mwmechanics/actors.cpp
index 60c96e5b9..d4dc5ea00 100644
--- a/apps/openmw/mwmechanics/actors.cpp
+++ b/apps/openmw/mwmechanics/actors.cpp
@@ -19,6 +19,7 @@ namespace MWMechanics
         // magic effects
         adjustMagicEffects (ptr);
         calculateDynamicStats (ptr);
+        calculateCreatureStatModifiers (ptr);
     }
 
     void Actors::updateNpc (const MWWorld::Ptr& ptr, float duration, bool paused)
@@ -67,6 +68,29 @@ namespace MWMechanics
         creatureStats.mDynamic[2].setBase (strength+willpower+agility+endurance);
     }
 
+    void Actors::calculateCreatureStatModifiers (const MWWorld::Ptr& ptr)
+    {
+        CreatureStats& creatureStats = MWWorld::Class::get (ptr).getCreatureStats (ptr);
+
+        // attributes
+        for (int i=0; i<5; ++i)
+        {
+            int modifier = creatureStats.mMagicEffects.get (EffectKey (79, i)).mMagnitude
+                - creatureStats.mMagicEffects.get (EffectKey (17, i)).mMagnitude;
+
+            creatureStats.mAttributes[0].setModifier (modifier);
+        }
+
+        // dynamic stats
+        for (int i=0; i<3; ++i)
+        {
+            int modifier = creatureStats.mMagicEffects.get (EffectKey (80+i)).mMagnitude
+                - creatureStats.mMagicEffects.get (EffectKey (18+i)).mMagnitude;
+
+            creatureStats.mDynamic[0].setModifier (modifier);
+        }
+    }
+
     Actors::Actors() : mDuration (0) {}
 
     void Actors::addActor (const MWWorld::Ptr& ptr)
diff --git a/apps/openmw/mwmechanics/actors.hpp b/apps/openmw/mwmechanics/actors.hpp
index 7458562e1..d5dcef487 100644
--- a/apps/openmw/mwmechanics/actors.hpp
+++ b/apps/openmw/mwmechanics/actors.hpp
@@ -29,6 +29,8 @@ namespace MWMechanics
 
             void calculateDynamicStats (const MWWorld::Ptr& ptr);
 
+            void calculateCreatureStatModifiers (const MWWorld::Ptr& ptr);
+
         public:
 
             Actors();
diff --git a/apps/openmw/mwmechanics/stat.hpp b/apps/openmw/mwmechanics/stat.hpp
index 996036fc1..d576020c5 100644
--- a/apps/openmw/mwmechanics/stat.hpp
+++ b/apps/openmw/mwmechanics/stat.hpp
@@ -147,7 +147,7 @@ namespace MWMechanics
             void modify (const T& diff)
             {
                 mStatic.modify (diff);
-                modifyCurrent (diff);
+                setCurrent (getCurrent()+diff);
             }
 
             void setCurrent (const T& value)
@@ -159,6 +159,13 @@ namespace MWMechanics
                 else if (mCurrent>getModified())
                     mCurrent = getModified();
             }
+
+            void setModifier (const T& modifier)
+            {
+                T diff =  modifier - mStatic.getModifier();
+                mStatic.setModifier (modifier);
+                setCurrent (getCurrent()+diff);
+            }
     };
 
     template<typename T>