diff --git a/core/services/llo/mercurytransmitter/transmitter.go b/core/services/llo/mercurytransmitter/transmitter.go
index 9f5bb1f4625..c8c826a343d 100644
--- a/core/services/llo/mercurytransmitter/transmitter.go
+++ b/core/services/llo/mercurytransmitter/transmitter.go
@@ -35,6 +35,7 @@ const (
 	// each server has a delete queue and a transmit queue.
 	//
 	// This could be reduced by implementing transmit batching, see: https://smartcontract-it.atlassian.net/browse/MERC-6635
+	// TODO: Should this be a configuration variable (e.g. set to 1 or 2 for testing?)
 	TransmitConcurrency = 100
 )