diff --git a/apps/openmw/mwworld/class.cpp b/apps/openmw/mwworld/class.cpp
index f51aa401c7..2ae6cb695d 100644
--- a/apps/openmw/mwworld/class.cpp
+++ b/apps/openmw/mwworld/class.cpp
@@ -34,7 +34,7 @@ namespace MWWorld
 
     }
 
-    bool Class::apply (const MWWorld::Ptr& ptr, const std::string& id) const
+    bool Class::apply (const MWWorld::Ptr& ptr, const std::string& id,  const MWWorld::Ptr& actor) const
     {
         return false;
     }
diff --git a/apps/openmw/mwworld/class.hpp b/apps/openmw/mwworld/class.hpp
index 1a3113f7c1..968ae79176 100644
--- a/apps/openmw/mwworld/class.hpp
+++ b/apps/openmw/mwworld/class.hpp
@@ -165,8 +165,10 @@ namespace MWWorld
             /// effects). Throws an exception, if the object can't hold other objects.
             /// (default implementation: throws an exception)
 
-            virtual bool apply (const MWWorld::Ptr& ptr, const std::string& id) const;
+            virtual bool apply (const MWWorld::Ptr& ptr, const std::string& id,
+                const MWWorld::Ptr& actor) const;
             ///< Apply \a id on \a ptr.
+            /// \param actor Actor that is resposible for the ID being applied to \a ptr.
             /// \return Any effect?
             ///
             /// (default implementation: ignore and return false)