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-rw-r--r--libs/surfaces/generic_midi/interface.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/surfaces/generic_midi/interface.cc b/libs/surfaces/generic_midi/interface.cc
index 8fb50cdaae..4dc7e236ca 100644
--- a/libs/surfaces/generic_midi/interface.cc
+++ b/libs/surfaces/generic_midi/interface.cc
@@ -28,6 +28,7 @@ static ControlProtocolDescriptor generic_midi_descriptor = {
id : "uri://ardour.org/surfaces/generic_midi:0",
ptr : 0,
module : 0,
+ mandatory : 0,
initialize : new_generic_midi_protocol,
destroy : delete_generic_midi_protocol
};