diff --git a/xen.spec b/xen.spec
index d568b0c..07991b9 100644
--- a/xen.spec
+++ b/xen.spec
@@ -7,7 +7,7 @@ Release: 0.20051109.fc5
 Group:   Development/Libraries
 License: GPL
 URL:     http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html
-Source0: http://www.cl.cam.ac.uk/Research/SRG/netos/xen/downloads/xen-unstable-src.tgz
+Source0: http://www.cl.cam.ac.uk/Research/SRG/netos/xen/downloads/xen-unstable-src.tar.gz
 Patch0: xen-misc-fixes.patch
 Patch1: xen-initscript.patch
 Patch2: xen-bootloader-fixes.patch