diff --git a/libmtp.changes b/libmtp.changes
index 34ccc04..d8dadd2 100644
--- a/libmtp.changes
+++ b/libmtp.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue May 27 01:39:24 UTC 2014 - crrodriguez@opensuse.org
+
+- Tell doxygen to stop producing files with timestamps. 
+- define udev macros only if not already there.
+
 -------------------------------------------------------------------
 Mon Dec  9 12:45:01 UTC 2013 - meissner@suse.com
 
diff --git a/libmtp.spec b/libmtp.spec
index 0b27465..36d4ed4 100644
--- a/libmtp.spec
+++ b/libmtp.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libmtp
 #
-# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -34,8 +34,9 @@ Source0:        http://downloads.sourceforge.net/project/%{name}/%{name}/%{versi
 Source1:        music-players.h
 Patch0:         mtpz-use-LIBMTP_ERROR-instead-of-LIBMTP_INFO.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-%define _udevrulesdir %(pkg-config --variable=udevdir udev)/rules.d
-%define _udevdir %(pkg-config --variable=udevdir udev)
+%{!?_udevrulesdir: %global _udevrulesdir %(pkg-config --variable=udevdir udev)/rules.d }
+%{!?_udevdir: %global _udevdir %(pkg-config --variable=udevdir udev) }
+
 %description
 This package contains binaries and documentation that allow access to
 USB based media players based on the MTP (Media Transfer Protocol)
@@ -82,6 +83,7 @@ Transfer Protocol) authored by Microsoft.
 cp %{SOURCE1} src/music-players.h
 
 %build
+echo 'HTML_TIMESTAMP=NO' >> doc/Doxyfile.in
 %configure --with-udev=%{_udevdir} --disable-static --enable-doxygen
 make %{?_smp_mflags}