diff --git a/perl-XS-Parse-Keyword.spec b/perl-XS-Parse-Keyword.spec
index f44635e..80f036e 100644
--- a/perl-XS-Parse-Keyword.spec
+++ b/perl-XS-Parse-Keyword.spec
@@ -9,7 +9,8 @@ License:        GPL-1.0-or-later OR Artistic-1.0-Perl
 URL:            https://metacpan.org/release/XS-Parse-Keyword
 Source0:        https://cpan.metacpan.org/authors/id/P/PE/PEVANS/XS-Parse-Keyword-%{version}.tar.gz
 Source1:        macros.perl-XS-Parse-Keyword
-# Fix a check for PL_infix_plugin, not suitable for upstream, bug #2226738
+# Fix a check for PL_infix_plugin, not suitable for upstream, bug #2226738,
+# CPAN RT#149179.
 Patch0:         XS-Parse-Keyword-0.36-No-special-linker-flags-for-checking-for-PL_infix_pl.patch
 BuildRequires:  coreutils
 BuildRequires:  perl-devel