diff --git a/apps/openmw/mwclass/npc.cpp b/apps/openmw/mwclass/npc.cpp
index 2cf4cf41c..57cc3560a 100644
--- a/apps/openmw/mwclass/npc.cpp
+++ b/apps/openmw/mwclass/npc.cpp
@@ -63,7 +63,7 @@ namespace MWClass
 
             for (std::vector<std::string>::const_iterator iter (ref->base->spells.list.begin());
                 iter!=ref->base->spells.list.end(); ++iter)
-                data->mNpcStats.mKnownSpells.insert (*iter);
+                data->mCreatureStats.mSpells.add (*iter);
 
             // creature stats
             data->mCreatureStats.mAttributes[0].set (ref->base->npdt52.strength);
diff --git a/apps/openmw/mwmechanics/npcstats.hpp b/apps/openmw/mwmechanics/npcstats.hpp
index 59bfa2ac0..ece85f893 100644
--- a/apps/openmw/mwmechanics/npcstats.hpp
+++ b/apps/openmw/mwmechanics/npcstats.hpp
@@ -11,6 +11,8 @@ namespace MWMechanics
     /// \brief Additional stats for NPCs
     ///
     /// For non-NPC-specific stats, see the CreatureStats struct.
+    ///
+    /// \note For technical reasons the spell list is also handled by CreatureStats.
 
     struct NpcStats
     {
@@ -26,7 +28,6 @@ namespace MWMechanics
         bool mSneak;
         bool mCombat;
 
-        std::set<std::string> mKnownSpells;
         std::string mSelectedSpell; // can be an empty string (no spell selected)
 
         NpcStats() : mForceRun (false), mForceSneak (false), mRun (false), mSneak (false),