diff --git a/lightning/src/ln/channel.rs b/lightning/src/ln/channel.rs
index 0977f98cfa0..c381568b877 100644
--- a/lightning/src/ln/channel.rs
+++ b/lightning/src/ln/channel.rs
@@ -429,6 +429,8 @@ pub(super) struct Channel<Signer: Sign> {
 	last_sent_closing_fee: Option<(u64, Signature)>, // (fee, holder_sig)
 	target_closing_feerate_sats_per_1000_weight: Option<u32>,
 
+	/// The minimum and maximum absolute fee we are willing to place on the closing transaction.
+	/// These are set once we reach `closing_negotiation_ready`.
 	#[cfg(test)]
 	pub(crate) closing_fee_limits: Option<(u64, u64)>,
 	#[cfg(not(test))]