diff --git a/alleggl-0.4.3-fullscreen-viewport.patch b/alleggl-0.4.3-fullscreen-viewport.patch
new file mode 100644
index 0000000..50842a0
--- /dev/null
+++ b/alleggl-0.4.3-fullscreen-viewport.patch
@@ -0,0 +1,18 @@
+diff -up alleggl/src/x.c~ alleggl/src/x.c
+--- alleggl/src/x.c~	2007-09-18 22:36:28.000000000 +0200
++++ alleggl/src/x.c	2009-09-10 22:09:01.000000000 +0200
+@@ -1005,6 +1005,14 @@ old_choose_visual:
+ #ifdef ALLEGROGL_HAVE_XF86VIDMODE
+ 	if (fullscreen) {
+ 		setattr.override_redirect = True;
++
++		/* Warp the pointer to the upper left corner, this is
++		   necessary as the: XF86VidModeSetViewPort() call below does
++		   not seem to do anything on newer Xorg servers, instead the
++		   viewport is always be centered at the last mouse position */
++		XWarpPointer(_xwin.display, None,
++			     XDefaultRootWindow(_xwin.display),
++			     0, 0, 0, 0, 0, 0);
+ 		if (!XF86VidModeSwitchToMode(_xwin.display, _xwin.screen,
+ 		                             _xwin.modesinfo[bestmode])) {
+ 
diff --git a/alleggl.spec b/alleggl.spec
index 43da54e..f7f5b5d 100644
--- a/alleggl.spec
+++ b/alleggl.spec
@@ -1,12 +1,13 @@
 Name:           alleggl
 Version:        0.4.3
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        OpenGL support library for Allegro
 Group:          System Environment/Libraries
 License:        zlib
 URL:            http://allegrogl.sourceforge.net/
 Source0:        http://downloads.sourceforge.net/allegrogl/%{name}-%{version}.tar.bz2
 Patch0:         alleggl-0.4.2-gcc43.patch
+Patch1:         alleggl-0.4.3-fullscreen-viewport.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:  allegro-devel libGLU-devel libX11-devel libXext-devel
 BuildRequires:  libXpm-devel libXxf86vm-devel
@@ -37,6 +38,7 @@ developing applications that use %{name}.
 %prep
 %setup -q -n %{name}
 %patch0 -p1
+%patch1 -p1
 
 
 %build
@@ -87,6 +89,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Thu Sep 10 2009 Hans de Goede <hdegoede@redhat.com> 0.4.3-6
+- Fix (workaround) viewport issues in fullscreen mode (#522116)
+
 * Fri Jul 24 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.4.3-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild