diff --git a/MozillaFirefox.spec b/MozillaFirefox.spec
index 93b7af90..5b534cfc 100644
--- a/MozillaFirefox.spec
+++ b/MozillaFirefox.spec
@@ -156,7 +156,7 @@ Source16:       MozillaFirefox.changes
 # please get your own set of keys.
 Source18:       mozilla-api-key
 Source19:       google-api-key
-Source20:       https://ftp.mozilla.org/pub/%{progname}/releases/%{version}/source/%{progname}-%{orig_version}%{orig_suffix}.source.tar.xz.asc
+Source20:       https://ftp.mozilla.org/pub/%{progname}/releases/%{version}%{orig_suffix}/source/%{progname}-%{orig_version}%{orig_suffix}.source.tar.xz.asc
 Source21:       mozilla.keyring
 # Gecko/Toolkit
 Patch1:         mozilla-nongnome-proxies.patch