diff --git a/.gitignore b/.gitignore
index 320cf4d..5bbc3ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ libX11-1.3.99.901.tar.bz2
 /libX11-1.4.99.1.tar.bz2
 /libX11-1.4.99.901.tar.bz2
 /libX11-1.5.0.tar.bz2
+/libX11-1.5.99.901.tar.bz2
diff --git a/libX11.spec b/libX11.spec
index 596da1e..2f3df79 100644
--- a/libX11.spec
+++ b/libX11.spec
@@ -3,8 +3,8 @@
 
 Summary: Core X11 protocol client library
 Name: libX11
-Version: 1.5.0
-Release: 4%{?dist}
+Version: 1.5.99.901
+Release: 1%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.x.org
@@ -109,6 +109,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}/man5/*.5*
 
 %changelog
+* Sun Mar 10 2013 Peter Hutterer <peter.hutterer@redhat.com> 1.5.99.901.-1
+- libX11 1.6RC1
+
 * Thu Feb 14 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.5.0-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
 
diff --git a/sources b/sources
index d33cef5..1eb426c 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-78b4b3bab4acbdf0abcfca30a8c70cc6  libX11-1.5.0.tar.bz2
+afee40a518a97b05300c26809d381497  libX11-1.5.99.901.tar.bz2