diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index 9be9594..1edfc04 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -124,11 +124,11 @@ Source300:      gcc48-%{gcc_version}.el5.src.rpm
 Source301:      yasm-1.2.0-3.el5.src.rpm
 Source302:      devtoolset-2-binutils-2.23.52.0.1-10.el5.src.rpm
 Source500:      thunderbird.sh.in.rhel5
-Source501:      thunderbird-centos-default-prefs.js.rhel5
+Source501:      thunderbird-centos-default-prefs.js.el5
 Source600:      thunderbird.sh.in.rhel6
-Source601:      thunderbird-centos-default-prefs.js.rhel6
+Source601:      thunderbird-centos-default-prefs.js.el6
 Source700:      thunderbird.sh.in.rhel7
-Source701:      thunderbird-centos-default-prefs.js.rhel7
+Source701:      thunderbird-centos-default-prefs.js.el7
 
 # Mozilla (XULRunner) patches
 Patch0:         firefox-install-dir.patch