--- a/MozillaFirefox/MozillaFirefox.spec	Sat Feb 18 22:22:24 2012 +0100
+++ b/MozillaFirefox/MozillaFirefox.spec	Tue Feb 21 16:36:37 2012 +0100
@@ -34,6 +34,7 @@
 BuildRequires:  startup-notification-devel
 BuildRequires:  unzip
 BuildRequires:  update-desktop-files
+BuildRequires:  xorg-x11-devel
 BuildRequires:  yasm
 BuildRequires:  zip
 %if %suse_version > 1110