diff --git a/pnm2ppa.spec b/pnm2ppa.spec
index 4bcddf0..3583283 100644
--- a/pnm2ppa.spec
+++ b/pnm2ppa.spec
@@ -6,7 +6,9 @@ Release: 19%{?dist}
 URL: http://sourceforge.net/projects/pnm2ppa 
 Source: http://download.sourceforge.net/pnm2ppa/pnm2ppa-%{version}.tar.gz
 Source1: http://www.httptech.com/ppa/files/ppa-0.8.6.tar.gz
+# Upstream sync.
 Patch2: pbm2ppa-20000205.diff
+# Use RPM_OPT_FLAGS.
 Patch3: pnm2ppa-redhat.patch
 License: GPLv2
 Group: Applications/Publishing