diff --git a/modules/qualify/qualify.c b/modules/qualify/qualify.c
index b0f9d00..887190c 100644
--- a/modules/qualify/qualify.c
+++ b/modules/qualify/qualify.c
@@ -187,8 +187,13 @@ static int call_start_qualify(struct call *call,
 	}
 
 	(void)call_msg_src(call, &peer_addr);
-	err = re_snprintf(peer_uri, sizeof(peer_uri), "sip:%H:%d",
-		   sa_print_addr, &peer_addr, sa_port(&peer_addr));
+
+	err = re_snprintf(peer_uri, sizeof(peer_uri),
+			  "sip:%s%j%s:%d",
+			  sa_af(&peer_addr) == AF_INET6 ? "[" : "",
+			  &peer_addr,
+			  sa_af(&peer_addr) == AF_INET6 ? "]" : "",
+			  sa_port(&peer_addr));
 
 	if (err <= 0) {
 		warning("qualify: failed to get peer URI for %s (%m)\n",