diff --git a/lib/codeclib.c b/lib/codeclib.c
index 3d47b5d71..3dc875326 100644
--- a/lib/codeclib.c
+++ b/lib/codeclib.c
@@ -312,7 +312,6 @@ static const dtx_method_t dtx_method_evs = {
 
 #ifdef HAVE_BCG729
 static packetizer_f packetizer_g729; // aggregate some frames into packets
-static format_cmp_f format_cmp_g729;
 
 static void bcg729_def_init(struct codec_def_s *);
 static const char *bcg729_decoder_init(decoder_t *, const str *);
@@ -463,7 +462,7 @@ static struct codec_def_s __codec_defs[] = {
 		.default_ptime = 20,
 		.minimum_ptime = 20,
 		.default_fmtp = "annexb=yes",
-		.format_cmp = format_cmp_g729,
+		.format_cmp = format_cmp_ignore,
 		.packetizer = packetizer_g729,
 		.bits_per_sample = 1, // 10 ms frame has 80 samples and encodes as (max) 10 bytes = 80 bits
 		.media_type = MT_AUDIO,
@@ -482,7 +481,7 @@ static struct codec_def_s __codec_defs[] = {
 		.default_ptime = 20,
 		.minimum_ptime = 20,
 		.default_fmtp = "annexb=no",
-		.format_cmp = format_cmp_g729,
+		.format_cmp = format_cmp_ignore,
 		.packetizer = packetizer_g729,
 		.bits_per_sample = 1, // 10 ms frame has 80 samples and encodes as (max) 10 bytes = 80 bits
 		.media_type = MT_AUDIO,
@@ -3609,22 +3608,6 @@ static int packetizer_g729(AVPacket *pkt, GString *buf, str *input_output, encod
 	input_output->len = output.s - input_output->s;
 	return buf->len >= 2 ? 1 : 0;
 }
-
-static bool g729_is_annex_b(const struct rtp_payload_type *p) {
-	// defaults based on codec name (G729 vs G729a)
-	bool annex_b = p->encoding.len && !((p->encoding.s[p->encoding.len - 1] & 0xdf) == 'A');
-	// override per fmtp
-	if (str_str(&p->format_parameters, "annexb=no") != -1)
-		annex_b = false;
-	else if (str_str(&p->format_parameters, "annexb=yes") != -1)
-		annex_b = true;
-	return annex_b;
-}
-static int format_cmp_g729(const struct rtp_payload_type *a, const struct rtp_payload_type *b) {
-	bool a_b = g729_is_annex_b(a);
-	bool b_b = g729_is_annex_b(b);
-	return a_b == b_b ? 0 : -1;
-}
 #endif
 
 
diff --git a/t/auto-daemon-tests.pl b/t/auto-daemon-tests.pl
index a3a3014e6..c31942091 100755
--- a/t/auto-daemon-tests.pl
+++ b/t/auto-daemon-tests.pl
@@ -1245,10 +1245,12 @@ v=0
 o=- 1737116508926565 1737116508926565 IN IP4 5.6.7.7
 s=SIP call
 t=0 0
-m=audio PORT RTP/AVP 8 0 100
+m=audio PORT RTP/AVP 8 0 18 100
 c=IN IP4 203.0.113.1
 a=rtpmap:8 PCMA/8000
 a=rtpmap:0 PCMU/8000
+a=rtpmap:18 G729/8000
+a=fmtp:18 annexb=no
 a=rtpmap:100 telephone-event/8000
 a=fmtp:100 0-11
 a=sendrecv
@@ -1306,10 +1308,11 @@ v=0
 o=- 1737116508926565 1737116508926565 IN IP4 5.6.7.7
 s=SIP call
 t=0 0
-m=audio PORT RTP/AVP 8 0 100
+m=audio PORT RTP/AVP 8 0 18 100
 c=IN IP4 203.0.113.1
 a=rtpmap:8 PCMA/8000
 a=rtpmap:0 PCMU/8000
+a=rtpmap:18 G729a/8000
 a=rtpmap:100 telephone-event/8000
 a=fmtp:100 0-11
 a=sendrecv
@@ -1367,10 +1370,12 @@ v=0
 o=- 1737116508926565 1737116508926565 IN IP4 5.6.7.7
 s=SIP call
 t=0 0
-m=audio PORT RTP/AVP 8 0 100
+m=audio PORT RTP/AVP 8 0 18 100
 c=IN IP4 203.0.113.1
 a=rtpmap:8 PCMA/8000
 a=rtpmap:0 PCMU/8000
+a=rtpmap:18 G729a/8000
+a=fmtp:18 annexb=no
 a=rtpmap:100 telephone-event/8000
 a=fmtp:100 0-11
 a=sendrecv
@@ -1428,10 +1433,12 @@ v=0
 o=- 1737116508926565 1737116508926565 IN IP4 5.6.7.7
 s=SIP call
 t=0 0
-m=audio PORT RTP/AVP 8 0 100
+m=audio PORT RTP/AVP 8 0 18 100
 c=IN IP4 203.0.113.1
 a=rtpmap:8 PCMA/8000
 a=rtpmap:0 PCMU/8000
+a=rtpmap:18 G729a/8000
+a=fmtp:18 annexb=no
 a=rtpmap:100 telephone-event/8000
 a=fmtp:100 0-11
 a=sendrecv