diff --git a/libs/evoral/src/Sequence.cpp b/libs/evoral/src/Sequence.cpp
index c578a9ebec..283ea009a3 100644
--- a/libs/evoral/src/Sequence.cpp
+++ b/libs/evoral/src/Sequence.cpp
@@ -1047,7 +1047,7 @@ Sequence<Time>::append_control_unlocked(const Parameter& param, Time time, doubl
 	DEBUG_TRACE (DEBUG::Sequence, string_compose ("%1 %2 @ %3 = %4 # controls: %5\n",
 	                                              this, _type_map.to_symbol(param), time, value, _controls.size()));
 	boost::shared_ptr<Control> c = control(param, true);
-	c->list()->add (time.to_double(), value);
+	c->list()->add (time.to_double(), value, true, false);
 	/* XXX control events should use IDs */
 }