diff --git a/daemon/call.c b/daemon/call.c
index 26949ba99..a73a00ec9 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -2675,13 +2675,11 @@ static void __call_monologue_init_from_flags(struct call_monologue *ml, struct c
 			(!ml->sdp_session_name || /* if not set yet */
 			(ml->sdp_session_name && !flags->replace_sess_name))) /* replace_sess_name = do not replace if possible*/
 		{
-			ml->sdp_session_name = call_strdup_len(flags->session_sdp_name.s,
-						flags->session_sdp_name.len);
+			ml->sdp_session_name = call_strdup_str(&flags->session_sdp_name);
 		}
 		/* sdp session timing */
 		if (flags->session_timing.len)
-			ml->sdp_session_timing = call_strdup_len(flags->session_timing.s,
-						flags->session_timing.len);
+			ml->sdp_session_timing = call_strdup_str(&flags->session_timing);
 		/* sdp bandwidth per session level
 		 * 0 value is supported (e.g. b=RR:0 and b=RS:0), to be able to disable rtcp */
 		ml->sdp_session_bandwidth.as = flags->session_bandwidth.as;
@@ -2691,8 +2689,7 @@ static void __call_monologue_init_from_flags(struct call_monologue *ml, struct c
 		ml->sdp_session_bandwidth.tias = flags->session_bandwidth.tias;
 		/* sdp session group */
 		if (flags->session_group.len)
-			ml->sdp_session_group = call_strdup_len(flags->session_group.s,
-						flags->session_group.len);
+			ml->sdp_session_group = call_strdup_str(&flags->session_group);
 	}
 
 	// reset offer ipv4/ipv6/mixed media stats
diff --git a/daemon/redis.c b/daemon/redis.c
index 9b4df63d3..6232953f9 100644
--- a/daemon/redis.c
+++ b/daemon/redis.c
@@ -1490,10 +1490,10 @@ static int redis_tags(call_t *c, struct redis_list *tags, parser_arg arg) {
 
 		/* s= */
 		if (!redis_hash_get_str(&s, rh, "sdp_session_name"))
-			ml->sdp_session_name = call_strdup_len(s.s, s.len);
+			ml->sdp_session_name = call_strdup_str(&s);
 		/* t= */
 		if (!redis_hash_get_str(&s, rh, "sdp_session_timing"))
-			ml->sdp_session_timing = call_strdup_len(s.s, s.len);
+			ml->sdp_session_timing = call_strdup_str(&s);
 		/* o= */
 		if (!redis_hash_get_str(&s, rh, "sdp_orig_parsed")) {
 			ml->session_sdp_orig = g_slice_alloc0(sizeof(*ml->session_sdp_orig));
diff --git a/include/call.h b/include/call.h
index cd7eb9b2f..22e28e623 100644
--- a/include/call.h
+++ b/include/call.h
@@ -880,6 +880,11 @@ INLINE char *call_strdup(const char *s) {
 		return NULL;
 	return call_strdup_len(s, strlen(s));
 }
+INLINE char *call_strdup_str(const str *s) {
+	if (!s)
+		return NULL;
+	return call_strdup_len(s->s, s->len);
+}
 INLINE str call_str_cpy_len(const char *in, size_t len) {
 	str out;
 	if (!in) {