diff --git a/apps/openmw/mwmechanics/creaturestats.cpp b/apps/openmw/mwmechanics/creaturestats.cpp
index 09603bff2..49e5bb390 100644
--- a/apps/openmw/mwmechanics/creaturestats.cpp
+++ b/apps/openmw/mwmechanics/creaturestats.cpp
@@ -1,5 +1,12 @@
 #include "creaturestats.hpp"
 
+#include <algorithm>
+
+#include <components/esm_store/store.hpp>
+
+#include "../mwbase/environment.hpp"
+#include "../mwbase/world.hpp"
+
 namespace MWMechanics
 {
     CreatureStats::CreatureStats()
@@ -55,4 +62,17 @@ namespace MWMechanics
     {
         return mAiSequence;   
     }
+    
+    float CreatureStats::getFatigueTerm() const  
+    {
+        int max = getFatigue().getModified();
+        int current = getFatigue().getCurrent();
+        
+        float normalised = max==0 ? 1 : std::max (0.0f, static_cast<float> (current)/max);
+
+        const ESMS::ESMStore& store = MWBase::Environment::get().getWorld()->getStore();
+         
+        return store.gameSettings.find ("fFatigueBase")->getFloat()
+            - store.gameSettings.find ("fFatigueMult")->getFloat() * (1-normalised);
+    }
 }
diff --git a/apps/openmw/mwmechanics/creaturestats.hpp b/apps/openmw/mwmechanics/creaturestats.hpp
index d19972e7b..bb6ec9451 100644
--- a/apps/openmw/mwmechanics/creaturestats.hpp
+++ b/apps/openmw/mwmechanics/creaturestats.hpp
@@ -106,6 +106,9 @@ namespace MWMechanics
         const AiSequence& getAiSequence() const;
         
         AiSequence& getAiSequence();
+   
+        float getFatigueTerm() const;
+        ///< Return effective fatigue
     };
 
     // Inline const getters