diff --git a/mutter.spec b/mutter.spec
index 389fe27..f3791e6 100644
--- a/mutter.spec
+++ b/mutter.spec
@@ -14,7 +14,7 @@ Summary:       Window and compositing manager based on Clutter
 License:       GPLv2+
 #VCS:          git:git://git.gnome.org/mutter
 URL:           http://www.gnome.org
-Source0:       http://download.gnome.org/sources/%{name}/40/%{name}-40.alpha.tar.xz
+Source0:       http://download.gnome.org/sources/%{name}/40/%{name}-40.alpha.1.tar.xz
 
 # Work-around for OpenJDK's compliance test
 Patch0:        0001-window-actor-Special-case-shaped-Java-windows.patch