diff --git a/vlib/net/urllib/urllib.v b/vlib/net/urllib/urllib.v
index 825ddb73a0..f82e5e1c71 100644
--- a/vlib/net/urllib/urllib.v
+++ b/vlib/net/urllib/urllib.v
@@ -598,12 +598,11 @@ fn parse_host(host string) ?string {
 			host3 := unescape(host[i..], .encode_host) or { return err.msg() }
 			return host1 + host2 + host3
 		}
-		if idx := host.last_index(':') {
-			colon_port = host[idx..i]
-			if !valid_optional_port(colon_port) {
-				return error(error_msg('parse_host: invalid port $colon_port after host ',
-					''))
-			}
+	} else if i := host.last_index(':') {
+		colon_port := host[i..]
+		if !valid_optional_port(colon_port) {
+			return error(error_msg('parse_host: invalid port $colon_port after host ',
+				''))
 		}
 	}
 	h := unescape(host, .encode_host) or { return err.msg() }
diff --git a/vlib/net/urllib/urllib_test.v b/vlib/net/urllib/urllib_test.v
index 920b392e18..ef4d773b48 100644
--- a/vlib/net/urllib/urllib_test.v
+++ b/vlib/net/urllib/urllib_test.v
@@ -111,6 +111,8 @@ fn test_parse() ? {
 		'telnet://192.0.2.16:80/',
 		'urn:oasis:names:specification:docbook:dtd:xml:4.1.2',
 		'foo://example.com:8042/over/there?name=ferret#nose',
+		'ftp://2001:0db8:85a3:0000:0000:8a2e:0370:7334/path/file.txt',
+		'ws://[2001:0db8:85a3:0000:0000:8a2e:0370:7334]:4000',
 	]
 	for url in urls {
 		_ := urllib.parse(url) or {