diff --git a/libs/pbd/pbd/memento_command.h b/libs/pbd/pbd/memento_command.h
index 22b2d4a42d..72d0228b6c 100644
--- a/libs/pbd/pbd/memento_command.h
+++ b/libs/pbd/pbd/memento_command.h
@@ -120,7 +120,6 @@ public:
 	}
 
 	~MementoCommand () {
-		drop_references ();
 		delete before;
 		delete after;
 		delete _binder;
diff --git a/libs/pbd/stateful_diff_command.cc b/libs/pbd/stateful_diff_command.cc
index 6236d6b53e..48ea675179 100644
--- a/libs/pbd/stateful_diff_command.cc
+++ b/libs/pbd/stateful_diff_command.cc
@@ -68,8 +68,6 @@ StatefulDiffCommand::StatefulDiffCommand (boost::shared_ptr<StatefulDestructible
 
 StatefulDiffCommand::~StatefulDiffCommand ()
 {
-        drop_references ();
-
         delete _changes;
 }