diff --git a/apps/openmw/mwclass/door.cpp b/apps/openmw/mwclass/door.cpp
index 12aeb9a5b..d15a01e9f 100644
--- a/apps/openmw/mwclass/door.cpp
+++ b/apps/openmw/mwclass/door.cpp
@@ -50,6 +50,9 @@ namespace MWClass
         ESMS::LiveCellRef<ESM::Door, MWWorld::RefData> *ref =
             ptr.get<ESM::Door>();
 
+        // TODO check lock
+        // TODO check trap
+
         if (ref->ref.teleport)
         {
             // teleport door
@@ -74,6 +77,19 @@ namespace MWClass
         }
     }
 
+    void Door::lock (const MWWorld::Ptr& ptr, int lockLevel) const
+    {
+        if (lockLevel<0)
+            lockLevel = 0;
+
+        ptr.getCellRef().lockLevel = lockLevel;
+    }
+
+    void Door::unlock (const MWWorld::Ptr& ptr) const
+    {
+        ptr.getCellRef().lockLevel = 0;
+    }
+
     std::string Door::getScript (const MWWorld::Ptr& ptr) const
     {
         ESMS::LiveCellRef<ESM::Door, MWWorld::RefData> *ref =
diff --git a/apps/openmw/mwclass/door.hpp b/apps/openmw/mwclass/door.hpp
index b6bf8808e..aecb117d3 100644
--- a/apps/openmw/mwclass/door.hpp
+++ b/apps/openmw/mwclass/door.hpp
@@ -21,6 +21,12 @@ namespace MWClass
                 const MWWorld::Ptr& actor, const MWWorld::Environment& environment) const;
             ///< Generate action for activation
 
+            virtual void lock (const MWWorld::Ptr& ptr, int lockLevel) const;
+            ///< Lock object
+
+            virtual void unlock (const MWWorld::Ptr& ptr) const;
+            ///< Unlock object
+
             virtual std::string getScript (const MWWorld::Ptr& ptr) const;
             ///< Return name of the script attached to ptr
 
diff --git a/apps/openmw/mwworld/class.cpp b/apps/openmw/mwworld/class.cpp
index e21e4908c..1e9f25bbd 100644
--- a/apps/openmw/mwworld/class.cpp
+++ b/apps/openmw/mwworld/class.cpp
@@ -77,6 +77,16 @@ namespace MWWorld
         throw std::runtime_error ("class does not support inserting into a container");
     }
 
+    void Class::lock (const Ptr& ptr, int lockLevel) const
+    {
+        throw std::runtime_error ("class does not support locking");
+    }
+
+    void Class::unlock (const Ptr& ptr) const
+    {
+        throw std::runtime_error ("class does not support unlocking");
+    }
+
     std::string Class::getScript (const Ptr& ptr) const
     {
         return "";
diff --git a/apps/openmw/mwworld/class.hpp b/apps/openmw/mwworld/class.hpp
index c3f4bff14..5153d7468 100644
--- a/apps/openmw/mwworld/class.hpp
+++ b/apps/openmw/mwworld/class.hpp
@@ -98,6 +98,12 @@ namespace MWWorld
             ///< Insert into a container or throw an exception, if class does not support inserting into
             /// a container.
 
+            virtual void lock (const Ptr& ptr, int lockLevel) const;
+            ///< Lock object (default implementation: throw an exception)
+
+            virtual void unlock (const Ptr& ptr) const;
+            ///< Unlock object (default implementation: throw an exception)
+
             virtual std::string getScript (const Ptr& ptr) const;
             ///< Return name of the script attached to ptr (default implementation: return an empty
             /// string).