diff --git a/apps/openmw/mwmechanics/actors.cpp b/apps/openmw/mwmechanics/actors.cpp
index 42851dea3..39276e964 100644
--- a/apps/openmw/mwmechanics/actors.cpp
+++ b/apps/openmw/mwmechanics/actors.cpp
@@ -47,6 +47,7 @@ namespace MWMechanics
         if(!paused)
         {
             updateDrowning(ptr, duration);
+            calculateNpcStatModifiers(ptr);
             updateEquippedLight(ptr, duration);
         }
     }
@@ -170,6 +171,20 @@ namespace MWMechanics
         }
     }
 
+    void Actors::calculateNpcStatModifiers (const MWWorld::Ptr& ptr)
+    {
+        NpcStats &npcStats = MWWorld::Class::get(ptr).getNpcStats(ptr);
+        const MagicEffects &effects = npcStats.getMagicEffects();
+
+        // skills
+        for(int i = 0;i < ESM::Skill::Length;++i)
+        {
+            Stat<float>& skill = npcStats.getSkill(i);
+            skill.setModifier(effects.get(EffectKey(ESM::MagicEffect::FortifySkill, i)).mMagnitude -
+                             effects.get(EffectKey(ESM::MagicEffect::DrainSkill, i)).mMagnitude);
+        }
+    }
+
     void Actors::updateDrowning(const MWWorld::Ptr& ptr, float duration)
     {
         MWBase::World *world = MWBase::Environment::get().getWorld();
diff --git a/apps/openmw/mwmechanics/actors.hpp b/apps/openmw/mwmechanics/actors.hpp
index a77e52ba3..eeef22635 100644
--- a/apps/openmw/mwmechanics/actors.hpp
+++ b/apps/openmw/mwmechanics/actors.hpp
@@ -34,11 +34,14 @@ namespace MWMechanics
 
         void updateNpc(const MWWorld::Ptr &ptr, float duration, bool paused);
 
+
+
             void adjustMagicEffects (const MWWorld::Ptr& creature);
 
             void calculateDynamicStats (const MWWorld::Ptr& ptr);
 
             void calculateCreatureStatModifiers (const MWWorld::Ptr& ptr);
+            void calculateNpcStatModifiers (const MWWorld::Ptr& ptr);
 
             void calculateRestoration (const MWWorld::Ptr& ptr, float duration);