diff --git a/lightningd/peer_control.c b/lightningd/peer_control.c
index bdf27ff27..ae40149ba 100644
--- a/lightningd/peer_control.c
+++ b/lightningd/peer_control.c
@@ -901,6 +901,7 @@ static struct command_result *json_close(struct command *cmd,
 {
 	const jsmntok_t *idtok;
 	struct peer *peer;
+	/* FIXME: gcc 7.3.0 thinks this might not be initialized. */
 	struct channel *channel = NULL;
 	unsigned int *timeout;
 	bool *force;