diff --git a/whois.spec b/whois.spec
index b8e28d4..301552b 100644
--- a/whois.spec
+++ b/whois.spec
@@ -7,7 +7,7 @@ License:    GPLv2+
 URL:        http://www.linux.it/~md/software/
 Source0:    http://ftp.debian.org/debian/pool/main/w/%{name}/%{name}_%{version}.tar.xz
 # Fix translating 6to4 addresses to IPv4 gatway addresses
-# <https://github.com/rfc1036/whois/pull/51>
+# <https://github.com/rfc1036/whois/pull/51>, in upstream after 5.2.15
 Patch0:     whois-5.2.15-Fix-misspellings-in-IPv4-formatting-string.patch
 BuildRequires:  coreutils
 BuildRequires:  gcc