diff --git a/libs/ardour/automatable.cc b/libs/ardour/automatable.cc
index 40b6eb2a07..be3701fc93 100644
--- a/libs/ardour/automatable.cc
+++ b/libs/ardour/automatable.cc
@@ -184,7 +184,7 @@ Automatable::describe_parameter (Evoral::Parameter param)
 		/* ID's are zero-based, present them as 1-based */
 		return (string_compose(_("Pan %1"), param.id() + 1));
 	} else if (param.type() == MidiCCAutomation) {
-		return string_compose("%2 [%3]",
+		return string_compose("%1: %2 [%3]",
 				param.id() + 1, midi_name(param.id()), int(param.channel()) + 1);
 	} else if (param.type() == MidiPgmChangeAutomation) {
 		return string_compose("Program [%1]", int(param.channel()) + 1);