diff --git a/.gitignore b/.gitignore
index 27401db..3b5292b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /less-436.tar.gz
 /less-443.tar.gz
 /less-444.tar.gz
+/less-451.tar.gz
diff --git a/less-436-empty-lessopen-pipe.patch b/less-436-empty-lessopen-pipe.patch
deleted file mode 100644
index 69f84ca..0000000
--- a/less-436-empty-lessopen-pipe.patch
+++ /dev/null
@@ -1,87 +0,0 @@
-diff -rup less-436-orig/filename.c less-436/filename.c
---- less-436-orig/filename.c	2009-07-06 22:52:23.000000000 +0200
-+++ less-436/filename.c	2011-02-09 16:36:59.508940154 +0100
-@@ -843,6 +843,16 @@ open_altfile(filename, pf, pfd)
- #else
- 		lessopen++;
- 		returnfd = 1;
-+
-+		if (*lessopen == '|') {
-+			/*
-+			 * If there is another vertical bar |, after
-+			 * the first one, it indicates a "pipe preprocessor"
-+			 * with correct exit status.
-+			 */
-+			lessopen++;
-+			returnfd = 2;
-+		}
- #endif
- 	}
- 	if (*lessopen == '-') {
-@@ -879,17 +888,32 @@ open_altfile(filename, pf, pfd)
- 		 */
- 		f = fileno(fd);
- 		SET_BINARY(f);
-+		*pfd = (void *) fd;
-+		*pf = f;
- 		if (read(f, &c, 1) != 1)
- 		{
- 			/*
--			 * Pipe is empty.  This means there is no alt file.
-+			 * Error or pipe is empty. Close it and eventually
-+			 * check exit status of the pipe process.
- 			 */
--			pclose(fd);
-+			if (pclose(fd) == 0 && returnfd == 2) {
-+				/*
-+				 * Exit status was zero, so the EOF was correct
-+				 * empty output. Let the program open /dev/null
-+				 * instead, as the pipe is already closed.
-+				 * Set force_open to omit bad_file() check
-+				 * failure, as it is special 'c' pseudo-device.
-+				 */
-+				*pf = 0;
-+				*pfd = NULL;
-+				force_open = 1;
-+				return (save("/dev/null"));
-+			}
-+			*pf = 0;
-+			*pfd = NULL;
- 			return (NULL);
- 		}
- 		ch_ungetchar(c);
--		*pfd = (void *) fd;
--		*pf = f;
- 		return (save("-"));
- 	}
- #endif
-diff -rup less-436-orig/less.nro less-436/less.nro
---- less-436-orig/less.nro	2011-02-09 16:00:12.520936431 +0100
-+++ less-436/less.nro	2011-02-09 16:30:33.161235986 +0100
-@@ -1147,11 +1147,26 @@ lesspipe.sh:
- .br
- 		;;
- .br
-+	*)	exit 1
-+.br
-+		;;
-+.br
- 	esac
- .br
-+	exit $?
-+.br
- .PP
- To use this script, put it where it can be executed and set
- LESSOPEN="|lesspipe.sh %s".
-+.PP
-+The script should return zero if the output was valid and non-zero
-+otherwise, so less could detect even a valid empty output
-+(for example while uncompressing gzipped empty file).
-+For backward-compatibility, this is not required by default. To turn
-+this functionality there should be another vertical bar (|) straight
-+after the first one in the LESSOPEN environment variable, eg.
-+LESSOPEN="||lesspipe.sh %s".
-+.PP
- When an input pipe is used, a LESSCLOSE postprocessor can be used,
- but it is usually not necessary since there is no replacement file
- to clean up.
diff --git a/less.spec b/less.spec
index 57693d9..f006e6e 100644
--- a/less.spec
+++ b/less.spec
@@ -1,7 +1,7 @@
 Summary: A text file browser similar to more, but better
 Name: less
-Version: 444
-Release: 8%{?dist}
+Version: 451
+Release: 1%{?dist}
 License: GPLv3+
 Group: Applications/Text
 Source: http://www.greenwoodsoftware.com/less/%{name}-%{version}.tar.gz
@@ -13,8 +13,7 @@ Patch2: less-394-search.patch
 Patch4: less-394-time.patch
 Patch5: less-418-fsync.patch
 Patch6: less-436-manpage-add-old-bot-option.patch
-Patch8: less-436-help.patch
-Patch9: less-436-empty-lessopen-pipe.patch
+Patch7: less-436-help.patch
 URL: http://www.greenwoodsoftware.com/less/
 Requires: groff
 BuildRequires: ncurses-devel
@@ -37,8 +36,7 @@ files, and you'll use it frequently.
 %patch4 -p1 -b .time
 %patch5 -p1 -b .fsync
 %patch6 -p1 -b .manpage-add-old-bot-option
-%patch8 -p1 -b .help
-%patch9 -p1 -b .empty-lessopen-pipe
+%patch7 -p1 -b .help
 autoreconf
 
 chmod -R a+w *
@@ -68,8 +66,9 @@ ls -la $RPM_BUILD_ROOT/etc/profile.d
 rm -rf $RPM_BUILD_ROOT
 
 %changelog
-* Thu Jul 19 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 444-8
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
+* Tue Sep 11 2012 Martin Briza <mbriza@redhat.com> - 451-1
+- Rebase to 451 (#835802)
+- Removed the empty-lessopen-pipe patch as the issue is now fixed upstream.
 
 * Mon May 14 2012 Vojtech Vitek (V-Teq) <vvitek@redhat.com> - 444-7
 - Fix less.sh not to override user-defined LESSOPEN variable (#802757)
diff --git a/sources b/sources
index 377197f..cf45a00 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-56f9f76ffe13f70155f47f6b3c87d421  less-444.tar.gz
+765f082658002b2b46b86af4a0da1842  less-451.tar.gz