diff --git a/lib/nodes/rtp.c b/lib/nodes/rtp.c
index 28f14019a..2819e28bd 100644
--- a/lib/nodes/rtp.c
+++ b/lib/nodes/rtp.c
@@ -172,7 +172,7 @@ int rtp_parse(struct node *n, json_t *cfg)
 
 	/* AIMD */
 	if (json_aimd) {
-		ret = json_unpack_ex(json_rtcp, &err, 0, "{ s?: F, s?: F, s?: F }",
+		ret = json_unpack_ex(json_aimd, &err, 0, "{ s?: F, s?: F, s?: F }",
 			"a", &r->aimd.a,
 			"b", &r->aimd.b,
 			"start_rate", &r->aimd.last_rate