diff --git a/apps/openmw/mwrender/objects.hpp b/apps/openmw/mwrender/objects.hpp
index 5c7ea32f4..3ce6266c8 100644
--- a/apps/openmw/mwrender/objects.hpp
+++ b/apps/openmw/mwrender/objects.hpp
@@ -57,7 +57,7 @@ public:
 };
 
 class Objects{
-    typedef std::map<MWWorld::Ptr,Animation*> PtrAnimationMap;
+    typedef std::map<MWWorld::ConstPtr,Animation*> PtrAnimationMap;
 
     typedef std::map<const MWWorld::CellStore*, osg::ref_ptr<osg::Group> > CellMap;
     CellMap mCellSceneNodes;