diff --git a/libs/ardour/session_midi.cc b/libs/ardour/session_midi.cc
index 0dcfea8ff6..aca9552e91 100644
--- a/libs/ardour/session_midi.cc
+++ b/libs/ardour/session_midi.cc
@@ -99,7 +99,7 @@ void
 Session::spp_start ()
 {
 	if (Config->get_mmc_control ()) {
-		request_roll (TRS_MIDIClock);
+		request_roll (TRS_MMC);
 	}
 }