diff --git a/ldb.changes b/ldb.changes
index ce34889..46e1ed1 100644
--- a/ldb.changes
+++ b/ldb.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu May 31 22:22:49 UTC 2012 - lmuelle@suse.com
+
+- Define and use talloc, tdb, and tevent version macros.
+- Define python_version if undefined.
+
 -------------------------------------------------------------------
 Thu May 31 13:46:42 UTC 2012 - lmuelle@suse.com
 
diff --git a/ldb.spec b/ldb.spec
index 033f001..e8519ac 100644
--- a/ldb.spec
+++ b/ldb.spec
@@ -17,7 +17,11 @@
 
 # norootforbuild
 
-#%{!?python_version:  %global python_version %(%{__python} -c "import sys; sys.stdout.write(sys.version[:3])")}
+%{!?python_version:  %global python_version %(%{__python} -c "from distutils.sysconfig import get_python_version; print(get_python_version())")}
+
+%define talloc_version 2.0.7
+%define tdb_version 1.2.10
+%define tevent_version 0.9.15
 
 Name:           libldb1
 %if 0%{?suse_version} > 1020
@@ -25,12 +29,12 @@ BuildRequires:  pkg-config
 %else
 BuildRequires:  pkgconfig
 %endif
-BuildRequires:  libtalloc-devel >= 2.0.7
-BuildRequires:  libtdb-devel >= 1.2.10
-BuildRequires:  libtevent-devel >= 0.9.15
-BuildRequires:  python-tdb >= 1.2.10
+BuildRequires:  libtalloc-devel >= %{talloc_version}
+BuildRequires:  libtdb-devel >= %{tdb_version}
+BuildRequires:  libtevent-devel >= %{tevent_version}
+BuildRequires:  python-tdb >= %{tdb_version}
 BuildRequires:  python-devel
-BuildRequires:  python-tevent >= 0.9.15
+BuildRequires:  python-tevent >= %{tevent_version}
 %if 0%{?suse_version} == 0 || 0%{?suse_version} > 1140
 %define	build_make_smp_mflags %{?_smp_mflags}
 %else