diff --git a/apps/openmw/mwclass/creature.cpp b/apps/openmw/mwclass/creature.cpp
index 38e0a826d..dc64fd3be 100644
--- a/apps/openmw/mwclass/creature.cpp
+++ b/apps/openmw/mwclass/creature.cpp
@@ -735,7 +735,7 @@ namespace MWClass
         customData.mCreatureStats.writeState (state2.mCreatureStats);
     }
 
-    int Creature::getBaseGold(const MWWorld::Ptr& ptr) const
+    int Creature::getBaseGold(const MWWorld::ConstPtr& ptr) const
     {
         return ptr.get<ESM::Creature>()->mBase->mData.mGold;
     }
diff --git a/apps/openmw/mwclass/creature.hpp b/apps/openmw/mwclass/creature.hpp
index 5076d36d0..27dc197f9 100644
--- a/apps/openmw/mwclass/creature.hpp
+++ b/apps/openmw/mwclass/creature.hpp
@@ -122,7 +122,7 @@ namespace MWClass
             virtual void writeAdditionalState (const MWWorld::ConstPtr& ptr, ESM::ObjectState& state) const;
             ///< Write additional state from \a ptr into \a state.
 
-            virtual int getBaseGold(const MWWorld::Ptr& ptr) const;
+            virtual int getBaseGold(const MWWorld::ConstPtr& ptr) const;
 
             virtual void respawn (const MWWorld::Ptr& ptr) const;
 
diff --git a/apps/openmw/mwclass/npc.cpp b/apps/openmw/mwclass/npc.cpp
index 42e28fc2f..7238ad453 100644
--- a/apps/openmw/mwclass/npc.cpp
+++ b/apps/openmw/mwclass/npc.cpp
@@ -1192,9 +1192,9 @@ namespace MWClass
         static_cast<const MWMechanics::CreatureStats&> (customData.mNpcStats).writeState (state2.mCreatureStats);
     }
 
-    int Npc::getBaseGold(const MWWorld::Ptr& ptr) const
+    int Npc::getBaseGold(const MWWorld::ConstPtr& ptr) const
     {
-        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();
+        const MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();
         if(ref->mBase->mNpdtType != ESM::NPC::NPC_WITH_AUTOCALCULATED_STATS)
             return ref->mBase->mNpdt52.mGold;
         else
diff --git a/apps/openmw/mwclass/npc.hpp b/apps/openmw/mwclass/npc.hpp
index b62192367..946276876 100644
--- a/apps/openmw/mwclass/npc.hpp
+++ b/apps/openmw/mwclass/npc.hpp
@@ -148,7 +148,7 @@ namespace MWClass
                 const;
             ///< Write additional state from \a ptr into \a state.
 
-            virtual int getBaseGold(const MWWorld::Ptr& ptr) const;
+            virtual int getBaseGold(const MWWorld::ConstPtr& ptr) const;
 
             virtual bool isClass(const MWWorld::Ptr& ptr, const std::string &className) const;
 
diff --git a/apps/openmw/mwworld/class.cpp b/apps/openmw/mwworld/class.cpp
index 7b57a2136..c4cef4a8b 100644
--- a/apps/openmw/mwworld/class.cpp
+++ b/apps/openmw/mwworld/class.cpp
@@ -399,7 +399,7 @@ namespace MWWorld
 
     void Class::writeAdditionalState (const MWWorld::ConstPtr& ptr, ESM::ObjectState& state) const {}
 
-    int Class::getBaseGold(const MWWorld::Ptr& ptr) const
+    int Class::getBaseGold(const MWWorld::ConstPtr& ptr) const
     {
         throw std::runtime_error("class does not support base gold");
     }
diff --git a/apps/openmw/mwworld/class.hpp b/apps/openmw/mwworld/class.hpp
index 26bd98aa4..fd2c1da8e 100644
--- a/apps/openmw/mwworld/class.hpp
+++ b/apps/openmw/mwworld/class.hpp
@@ -320,7 +320,7 @@ namespace MWWorld
 
             static void registerClass (const std::string& key,  boost::shared_ptr<Class> instance);
 
-            virtual int getBaseGold(const MWWorld::Ptr& ptr) const;
+            virtual int getBaseGold(const MWWorld::ConstPtr& ptr) const;
 
             virtual bool isClass(const MWWorld::Ptr& ptr, const std::string &className) const;