diff --git a/lightning/src/ln/chan_utils.rs b/lightning/src/ln/chan_utils.rs
index 2f31af2f56d..deb3b632864 100644
--- a/lightning/src/ln/chan_utils.rs
+++ b/lightning/src/ln/chan_utils.rs
@@ -66,7 +66,8 @@ pub(crate) enum HTLCType {
 }
 
 impl HTLCType {
-	/// Check if a given tx witnessScript len matchs one of a pre-signed HTLC
+	/// Check if a given tx witnessScript len matchs one of a pre-signed HTLC. The returned
+	/// `HTLCType` can match incorrectly based on the value of `opt_anchors`.
 	pub(crate) fn scriptlen_to_htlctype(witness_script_len: usize, opt_anchors: bool) ->  Option<HTLCType> {
 		if opt_anchors {
 			if witness_script_len == 136 {