diff --git a/apps/openmw/mwworld/class.hpp b/apps/openmw/mwworld/class.hpp
index c3f94d7f10..4e36a8da9b 100644
--- a/apps/openmw/mwworld/class.hpp
+++ b/apps/openmw/mwworld/class.hpp
@@ -165,7 +165,7 @@ namespace MWWorld
             virtual bool hasInventoryStore (const Ptr& ptr) const;
             ///< Does this object have an inventory store, i.e. equipment slots? (default implementation: false)
 
-            virtual void lock (const Ptr& ptr, int lockLevel) const;
+            virtual void lock (const Ptr& ptr, int lockLevel = 0) const;
             ///< Lock object (default implementation: throw an exception)
 
             virtual void unlock (const Ptr& ptr) const;
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index 727b200f57..b8d531a58a 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -2526,7 +2526,7 @@ namespace MWWorld
                     store.remove(*it, it->getRefData().getCount(), ptr);
                 }
             }
-            closestChest.getClass().unlock(closestChest);
+            closestChest.getClass().lock(closestChest);
         }
     }