diff --git a/libpgm-5.2.122.tar.bz2 b/openpgm-release-5-2-122.tar.gz
similarity index 100%
rename from libpgm-5.2.122.tar.bz2
rename to openpgm-release-5-2-122.tar.gz
diff --git a/openpgm.spec b/openpgm.spec
index 733fd5d..7eb2fc4 100644
--- a/openpgm.spec
+++ b/openpgm.spec
@@ -23,6 +23,7 @@
 %define major       5.2
 %define mpkg        5_2
 %define soname      0
+%define tarball_version 5-2-122
 %define libname     libpgm-%{mpkg}-%{soname}
 
 Name:           openpgm
@@ -32,7 +33,7 @@ Summary:        OpenPGM implementation of the Reliable Multicast Protocol
 License:        LGPL-2.1+
 Group:          Development/Libraries/C and C++
 Url:            https://github.com/steve-o/openpgm
-Source:         https://github.com/steve-o/openpgm/archive/release-5-2-122.tar.gz#/libpgm-%{version}.tar.bz2
+Source:         https://github.com/steve-o/openpgm/archive/release-5-2-122.tar.gz#/openpgm-release-%{tarball_version}.tar.gz
 # PATCH-FIX-UPSTREAM bmwiedemann https://github.com/steve-o/openpgm/pull/48
 Patch0:         libpgm-5.2.122-reproducible.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -72,7 +73,7 @@ notify an application of unrecoverable loss.
 This subpackage contains the header files for OpenPGM.
 
 %prep
-%setup -q -n "libpgm-%{version}/openpgm/pgm"
+%setup -q -n "%{name}-release-%{tarball_version}/openpgm/pgm"
 %patch0 -p1
 
 %build