diff --git a/libs/pbd/pbd/stateful.h b/libs/pbd/pbd/stateful.h
index e8ced2c2f0..80a5a2f75f 100644
--- a/libs/pbd/pbd/stateful.h
+++ b/libs/pbd/pbd/stateful.h
@@ -101,7 +101,7 @@ class Stateful {
 	   of property values after either a PropertyList or XML 
 	   driven property change.
 	*/
-	virtual void post_set () { };
+	virtual void post_set (const PropertyChange&) { };
 
 	XMLNode *_extra_xml;
 	XMLNode *_instant_xml;
diff --git a/libs/pbd/stateful.cc b/libs/pbd/stateful.cc
index c33418ce39..8ee587fbc6 100644
--- a/libs/pbd/stateful.cc
+++ b/libs/pbd/stateful.cc
@@ -193,7 +193,7 @@ Stateful::set_values (XMLNode const & node)
 		}
 	}
 
-	post_set ();
+	post_set (c);
 
 	return c;
 }
@@ -227,7 +227,7 @@ Stateful::apply_changes (const PropertyList& property_list)
                 }
 	}
 	
-	post_set ();
+	post_set (c);
 
 	send_change (c);