diff --git a/sane-frontends.spec b/sane-frontends.spec
index da61c3c..cb2f12a 100644
--- a/sane-frontends.spec
+++ b/sane-frontends.spec
@@ -4,7 +4,13 @@ Release: 16%{?dist}
 Summary: Graphical frontend to SANE
 URL: http://www.sane-project.org
 Source0: ftp://ftp.sane-project.org/pub/sane/%{name}-%{version}/%{name}-%{version}.tar.gz
+# Fix array subscript out of bounds errors (#133121).
+# Upstream commit 5113e3de39846a8226909088ad5c1aa4969f3030 and commit
+# 7336b064653026171a715dfaf803693b638c67a5 (partial)
 Patch0: sane-frontends-1.0.14-array-out-of-bounds.patch
+# Fix building with sane-backends >= 1.0.20.
+# Upstream commit 5e96223e497538d06e18d8e84b774c4a35f654b4 (partial) and commit
+# c554cfce37e37a33f94a9051afe2062c4759072b
 Patch1: sane-frontends-1.0.14-sane-backends-1.0.20.patch
 License: GPLv2+
 Group: Applications/System
@@ -39,6 +45,9 @@ rm -f %{buildroot}%{_datadir}/sane/sane-style.rc
 # intended to be used from the command line
 
 %changelog
+* Mon Jul 08 2013 Nils Philippsen <nils@redhat.com>
+- add comments to patches
+
 * Thu Feb 14 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.0.14-16
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild