diff --git a/pytz.spec b/pytz.spec
index 0dd83ae..e5f6087 100644
--- a/pytz.spec
+++ b/pytz.spec
@@ -13,6 +13,7 @@ Group:          Development/Languages
 License:        MIT
 URL:            http://pytz.sourceforge.net/
 Source0:        http://pypi.python.org/packages/source/p/%{name}/%{name}-%{version}.tar.gz
+# Patch to use the system supplied zoneinfo files
 Patch0:         pytz-zoneinfo.patch
 
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)