diff --git a/lvm2.spec b/lvm2.spec
index 2808c23..b0a2830 100644
--- a/lvm2.spec
+++ b/lvm2.spec
@@ -63,6 +63,7 @@ mkdir -p -m755 $RPM_BUILD_ROOT/etc/rc.d/init.d
 install scripts/clvmd_init_red_hat $RPM_BUILD_ROOT/etc/rc.d/init.d/clvmd
 install -m 0755 scripts/lvmconf.sh $RPM_BUILD_ROOT/sbin/lvmconf
 mv $RPM_BUILD_ROOT/usr/include/lvm.h $RPM_BUILD_ROOT/usr/include/lvm2app.h
+mv $RPM_BUILD_ROOT/usr%{_libdir}/pkgconfig/liblvm2app.pc $RPM_BUILD_ROOT/usr%{_libdir}/pkgconfig/lvm2app.pc
 
 %clean
 rm -rf $RPM_BUILD_ROOT
@@ -178,6 +179,7 @@ Group: Development/Libraries
 License: LGPLv2
 Requires: %{name} = %{version}-%{release}
 Requires: %{name}-libs = %{version}-%{release}
+Requires: device-mapper-devel >= %{device_mapper_version}-%{release}
 Requires: pkgconfig
 
 %description devel
@@ -190,7 +192,7 @@ the lvm2 libraries.
 %attr(755,root,root) /%{_lib}/liblvm2cmd.so
 %{_includedir}/lvm2app.h
 %{_includedir}/lvm2cmd.h
-/usr%{_libdir}/pkgconfig/liblvm2app.pc
+/usr%{_libdir}/pkgconfig/lvm2app.pc
 
 %package libs
 Summary: lvm2 shared libraries
@@ -306,6 +308,10 @@ This package contains the device-mapper shared library, libdevmapper.
 
 
 %changelog
+* Thu Jul 30 2009 Alasdair Kergon <agk@redhat.com> - 2.02.50-2
+- lvm2-devel requires device-mapper-devel.
+- Fix lvm2app.pc filename.
+
 * Tue Jul 28 2009 Alasdair Kergon <agk@redhat.com> - 2.02.50-1
 - Add libs and devel subpackages to include shared libraries for applications.
   N.B. The liblvm2app API is not frozen yet and may still be changed