diff --git a/lyx-1.6.5-autoconf_2.65.patch b/lyx-1.6.5-autoconf_2.65.patch
new file mode 100644
index 0000000..eaf4060
--- /dev/null
+++ b/lyx-1.6.5-autoconf_2.65.patch
@@ -0,0 +1,17 @@
+diff -ur lyx-1.6.5.orig/autogen.sh lyx-1.6.5/autogen.sh
+--- lyx-1.6.5.orig/autogen.sh	2009-11-27 13:43:40.000000000 +0000
++++ lyx-1.6.5/autogen.sh	2009-12-09 23:33:36.133301389 +0000
+@@ -38,11 +38,11 @@
+ 
+ 
+ case $autoversion in
+-    *' '2.59[cd]|*' '2.60[ab]|*' '2.6[0-4])
++    *' '2.59[cd]|*' '2.60[ab]|*' '2.6[0-5])
+ 	;;
+     *)
+ 	echo "This autoconf version is not supported by LyX."
+-	echo "LyX only supports autoconf 2.59c-2.64."
++	echo "LyX only supports autoconf 2.59c-2.65."
+ 	exit 1
+ 	;;
+ esac
diff --git a/lyx.spec b/lyx.spec
index 2009856..4d39667 100644
--- a/lyx.spec
+++ b/lyx.spec
@@ -24,7 +24,7 @@ BuildRequires: fontpackages-devel
 Summary: WYSIWYM (What You See Is What You Mean) document processor
 Name:	 lyx
 Version: 1.6.5
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 License: GPLv2+
 Group: 	 Applications/Publishing
@@ -34,6 +34,9 @@ Source0: ftp://ftp.devel.lyx.org/pub/lyx/stable/lyx-%{version}%{?pre}.tar.bz2
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 Patch1: lyx-1.6.5-xdg_open.patch
+# This patch should be upstream for lyx-1.6.6
+# (we only need this because of patch #50)
+Patch2: lyx-1.6.5-autoconf_2.65.patch
 ## upstreamed patches
 # http://bugzilla.redhat.com/524046 , http://www.lyx.org/trc/ticket/6226
 Patch50: lyx-1.6.5-enchant.patch
@@ -245,6 +248,7 @@ Requires: %{fontname}-fonts-common = %{version}-%{release}
 %setup -q -n %{name}-%{version}%{?pre}
 
 %patch1 -p1 -b .xdg_open
+%patch2 -p1 -b .autoconf_2.65
 
 %patch50 -p1 -b .enchant
 
@@ -446,6 +450,9 @@ fc-cache %{_fontdir} 2> /dev/null ||:
 
 
 %changelog
+* Wed Dec  9 2009 José Matos <jamatos@fc.up.pt> - 1.6.5-2
+- Add patch for autoconf 2.65 (F13+)
+
 * Wed Dec  9 2009 José Matos <jamatos@fc.up.pt> - 1.6.5-1
 - lyx-1.6.5