diff --git a/apps/openmw/mwgui/statswindow.cpp b/apps/openmw/mwgui/statswindow.cpp
index 17bb24e838..37128c43f3 100644
--- a/apps/openmw/mwgui/statswindow.cpp
+++ b/apps/openmw/mwgui/statswindow.cpp
@@ -185,7 +185,7 @@ namespace MWGui
         MyGUI::TextBox* widget = mSkillWidgetMap[(int)parSkill];
         if (widget)
         {
-            float modified = value.getModified(), base = value.getBase();
+            int modified = value.getModified(), base = value.getBase();
             std::string text = boost::lexical_cast<std::string>(std::floor(modified));
             std::string state = "normal";
             if (modified > base)
diff --git a/apps/openmw/mwmechanics/npcstats.cpp b/apps/openmw/mwmechanics/npcstats.cpp
index 289fcc70fe..f77b042716 100644
--- a/apps/openmw/mwmechanics/npcstats.cpp
+++ b/apps/openmw/mwmechanics/npcstats.cpp
@@ -207,7 +207,7 @@ void MWMechanics::NpcStats::useSkill (int skillIndex, const ESM::Class& class_,
     if(mIsWerewolf)
         return;
 
-    MWMechanics::SkillValue value = getSkill (skillIndex);
+    MWMechanics::SkillValue& value = getSkill (skillIndex);
 
     value.setProgress(value.getProgress() + getSkillGain (skillIndex, class_, usageType));
 
diff --git a/apps/openmw/mwmechanics/stat.hpp b/apps/openmw/mwmechanics/stat.hpp
index e66cf86de7..75ac6939aa 100644
--- a/apps/openmw/mwmechanics/stat.hpp
+++ b/apps/openmw/mwmechanics/stat.hpp
@@ -246,6 +246,18 @@ namespace MWMechanics
     {
         return !(left == right);
     }
+
+    inline bool operator== (const SkillValue& left, const SkillValue& right)
+    {
+        return left.getBase() == right.getBase()
+                && left.getModifier() == right.getModifier()
+                && left.getDamage() == right.getDamage()
+                && left.getProgress() == right.getProgress();
+    }
+    inline bool operator!= (const SkillValue& left, const SkillValue& right)
+    {
+        return !(left == right);
+    }
 }
 
 #endif