diff --git a/cmd/lncli/commands.go b/cmd/lncli/commands.go
index 11b73444..99c918bf 100644
--- a/cmd/lncli/commands.go
+++ b/cmd/lncli/commands.go
@@ -3364,7 +3364,8 @@ var updateChannelPolicyCommand = cli.Command{
 			Name: "fee_rate",
 			Usage: "the fee rate that will be charged " +
 				"proportionally based on the value of each " +
-				"forwarded HTLC, the lowest possible rate is 0.000001",
+				"forwarded HTLC, the lowest possible rate is 0 " +
+				"with a granularity of 0.000001 (millionths)",
 		},
 		cli.Int64Flag{
 			Name: "time_lock_delta",