diff --git a/ksh-20120801-argvfix.patch b/ksh-20120801-argvfix.patch
new file mode 100644
index 0000000..b0e1a78
--- /dev/null
+++ b/ksh-20120801-argvfix.patch
@@ -0,0 +1,13 @@
+diff -up ksh-20120801/src/cmd/ksh93/sh/main.c.fixargs ksh-20120801/src/cmd/ksh93/sh/main.c
+--- ksh-20120801/src/cmd/ksh93/sh/main.c.fixargs	2013-12-31 11:32:14.917874134 +0100
++++ ksh-20120801/src/cmd/ksh93/sh/main.c	2013-12-31 11:32:58.028847126 +0100
+@@ -757,7 +757,7 @@ static void fixargs(char **argv, int mod
+ 		offset += size;
+ 		buff[offset++] = ' ';
+ 	}
+-	buff[offset-1] = 0;
++	memset(&buff[offset - 1], 0, command_len - offset + 1);
+ #   ifdef PSTAT
+ 	un.pst_command = stakptr(0);
+ 	pstat(PSTAT_SETCMD,un,0,0,0);
+
diff --git a/ksh.spec b/ksh.spec
index 8bd8479..c9eb5da 100644
--- a/ksh.spec
+++ b/ksh.spec
@@ -6,7 +6,7 @@ URL:          http://www.kornshell.com/
 Group:        System Environment/Shells
 License:      EPL
 Version:      20120801
-Release:      12%{?dist}
+Release:      13%{?dist}
 Source0:      http://www.research.att.com/~gsf/download/tgz/ast-ksh.%{releasedate}.tgz
 Source1:      http://www.research.att.com/~gsf/download/tgz/INIT.%{releasedate}.tgz
 Source2:      kshcomp.conf
@@ -28,6 +28,7 @@ Patch7: ksh-20130214-fixkill.patch
 Patch8: ksh-20120801-kshmfix.patch
 Patch9: ksh-20120801-memlik.patch
 Patch10: ksh-20120801-mtty.patch
+Patch11: ksh-20120801-argvfix.patch
 
 BuildRoot:    %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 Conflicts:    pdksh
@@ -57,6 +58,7 @@ with "sh" (the Bourne Shell).
 %patch8 -p1 -b .kshmfix
 %patch9 -p1 -b .memlik
 %patch10 -p1 -b .mtty
+%patch11 -p1 -b .argvfix
 
 #/dev/fd test does not work because of mock
 sed -i 's|ls /dev/fd|ls /proc/self/fd|' src/cmd/ksh93/features/options
@@ -151,6 +153,9 @@ fi
     rm -rf $RPM_BUILD_ROOT
 
 %changelog
+* Mon Jan 06 2014 Michal Hlavinka <mhlavink@redhat.com> - 20120801-13
+- fix argv rewrite (#1047508)
+
 * Wed Oct 30 2013 Michal Hlavinka <mhlavink@redhat.com> - 20120801-12
 - ksh stops on read when monitor mode is enabled
 
@@ -397,7 +402,7 @@ fi
 * Wed Feb 25 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 20081104-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild
 
-* Tue Jan 21 2009 Michal Hlavinka <mhlavink@redhat.com> 20081104-1
+* Wed Jan 21 2009 Michal Hlavinka <mhlavink@redhat.com> 20081104-1
 - update to 2008-11-04
 - ast-ksh-locales are not useable remove them