diff --git a/daemon/call.c b/daemon/call.c
index e9526a07a..aaf5324be 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -4584,7 +4584,8 @@ static bool call_monologues_associations_left(call_t * c) {
 static int call_get_monologue_new(struct call_monologue *monologues[2], call_t *call,
 		const str *fromtag,
 		const str *totag,
-		const str *viabranch)
+		const str *viabranch,
+		sdp_ng_flags *flags)
 {
 	struct call_monologue *ret, *os = NULL; /* ret - initial offer, os - other side */
 
@@ -4676,7 +4677,8 @@ finish:
 static int call_get_dialogue(struct call_monologue *monologues[2], call_t *call,
 		const str *fromtag,
 		const str *totag,
-		const str *viabranch)
+		const str *viabranch,
+		sdp_ng_flags *flags)
 {
 	struct call_monologue *ft, *tt;
 
@@ -4686,7 +4688,7 @@ static int call_get_dialogue(struct call_monologue *monologues[2], call_t *call,
 	/* we start with the to-tag. if it's not known, we treat it as a branched offer */
 	tt = call_get_monologue(call, totag);
 	if (!tt)
-		return call_get_monologue_new(monologues, call, fromtag, totag, viabranch);
+		return call_get_monologue_new(monologues, call, fromtag, totag, viabranch, flags);
 
 	/* if the from-tag is known already, return that */
 	ft = call_get_monologue(call, fromtag);
@@ -4765,13 +4767,14 @@ done:
 int call_get_mono_dialogue(struct call_monologue *monologues[2], call_t *call,
 		const str *fromtag,
 		const str *totag,
-		const str *viabranch)
+		const str *viabranch,
+		sdp_ng_flags *flags)
 {
 	/* initial offer */
 	if (!totag || !totag->s)
-		return call_get_monologue_new(monologues, call, fromtag, NULL, viabranch);
+		return call_get_monologue_new(monologues, call, fromtag, NULL, viabranch, flags);
 
-	return call_get_dialogue(monologues, call, fromtag, totag, viabranch);
+	return call_get_dialogue(monologues, call, fromtag, totag, viabranch, flags);
 }
 
 static void media_stop(struct call_media *m) {
diff --git a/daemon/call_interfaces.c b/daemon/call_interfaces.c
index 453fe1b2c..0b5dda4b2 100644
--- a/daemon/call_interfaces.c
+++ b/daemon/call_interfaces.c
@@ -194,7 +194,7 @@ static str *call_update_lookup_udp(char **out, enum call_opmode opmode, const ch
 
 	updated_created_from(c, addr, sin);
 
-	if (call_get_mono_dialogue(monologues, c, &fromtag, &totag, NULL))
+	if (call_get_mono_dialogue(monologues, c, &fromtag, &totag, NULL, NULL))
 		goto ml_fail;
 
 	struct call_monologue *from_ml = monologues[0];
@@ -357,7 +357,7 @@ static str *call_request_lookup_tcp(char **out, enum call_opmode opmode) {
 		str_swap(&fromtag, &totag);
 	}
 
-	if (call_get_mono_dialogue(monologues, c, &fromtag, &totag, NULL)) {
+	if (call_get_mono_dialogue(monologues, c, &fromtag, &totag, NULL, NULL)) {
 		ilog(LOG_WARNING, "Invalid dialogue association");
 		goto out2;
 	}
@@ -2243,7 +2243,7 @@ static const char *call_offer_answer_ng(ng_command_ctx_t *ctx, enum call_opmode
 
 	errstr = "Invalid dialogue association";
 	if (call_get_mono_dialogue(monologues, call, &flags.from_tag, &flags.to_tag,
-			flags.via_branch.s ? &flags.via_branch : NULL)) {
+			flags.via_branch.s ? &flags.via_branch : NULL, &flags)) {
 		goto out;
 	}
 
diff --git a/include/call.h b/include/call.h
index 5b3e9921f..4c3b04dfb 100644
--- a/include/call.h
+++ b/include/call.h
@@ -824,7 +824,8 @@ void call_make_own_foreign(call_t *c, bool foreign);
 int call_get_mono_dialogue(struct call_monologue *monologues[2], call_t *call,
 		const str *fromtag,
 		const str *totag,
-		const str *viabranch);
+		const str *viabranch,
+		sdp_ng_flags *);
 struct call_monologue *call_get_monologue(call_t *call, const str *fromtag);
 struct call_monologue *call_get_or_create_monologue(call_t *call, const str *fromtag);
 call_t *call_get(const str *callid);