diff --git a/netpbm-pnmsmooth-segfault.patch b/netpbm-pnmsmooth-segfault.patch
new file mode 100644
index 0000000..1d77617
--- /dev/null
+++ b/netpbm-pnmsmooth-segfault.patch
@@ -0,0 +1,66 @@
+diff -up netpbm-10.47.04/editor/pnmsmooth.c.pnmsmooth-segfault netpbm-10.47.04/editor/pnmsmooth.c
+--- netpbm-10.47.04/editor/pnmsmooth.c.pnmsmooth-segfault	2009-10-21 13:38:57.000000000 +0200
++++ netpbm-10.47.04/editor/pnmsmooth.c	2009-03-23 07:55:01.000000000 +0100
+@@ -23,12 +23,12 @@
+ #include <unistd.h>
+ #include <string.h>
+ #include <errno.h>
++#include <sys/wait.h>
+ 
+ #include "pm_c_util.h"
+ #include "mallocvar.h"
+ #include "shhopt.h"
+ #include "nstring.h"
+-#include "pm_system.h"
+ #include "pnm.h"
+ 
+ 
+@@ -176,6 +176,38 @@ writeConvolutionImage(FILE *       const
+ 
+ 
+ 
++static void
++runPnmconvol(const char * const inputFilespec,
++             const char * const convolutionImageFilespec) {
++
++    /* fork a Pnmconvol process */
++    pid_t rc;
++
++    rc = fork();
++    if (rc < 0)
++        pm_error("fork() failed.  errno=%d (%s)", errno, strerror(errno));
++    else if (rc == 0) {
++        /* child process executes following code */
++
++        execlp("pnmconvol",
++               "pnmconvol", convolutionImageFilespec, inputFilespec,
++               NULL);
++
++        pm_error("error executing pnmconvol command.  errno=%d (%s)",
++                 errno, strerror(errno));
++    } else {
++        /* This is the parent */
++        pid_t const childPid = rc;
++
++        int status;
++
++        /* wait for child to finish */
++        while (wait(&status) != childPid);
++    }
++}
++
++
++
+ int
+ main(int argc, char ** argv) {
+ 
+@@ -200,8 +232,7 @@ main(int argc, char ** argv) {
+     if (cmdline.dump) {
+         /* We're done.  Convolution image is in user's file */
+     } else {
+-        pm_system_lp("pnmconvol", NULL, NULL, NULL, NULL,
+-                     tempfileName, cmdline.inputFilespec, NULL);
++        runPnmconvol(cmdline.inputFilespec, tempfileName);
+ 
+         unlink(tempfileName);
+         strfree(tempfileName);
diff --git a/netpbm.spec b/netpbm.spec
index 8c748a7..686053b 100644
--- a/netpbm.spec
+++ b/netpbm.spec
@@ -1,13 +1,13 @@
 Summary: A library for handling different graphics file formats
 Name: netpbm
 Version: 10.47.04
-Release: 2%{?dist}
+Release: 3%{?dist}
 # See copyright_summary for details
 License: BSD and GPLv2 and IJG and MIT and Public Domain
 Group: System Environment/Libraries
 URL: http://netpbm.sourceforge.net/
 # Source0 is prepared by
-# svn checkout https://netpbm.svn.sourceforge.net/svnroot/netpbm/super_stable netpbm-%{version}
+# svn checkout https://netpbm.svn.sourceforge.net/svnroot/netpbm/stable netpbm-%{version}
 # svn checkout https://netpbm.svn.sourceforge.net/svnroot/netpbm/userguide netpbm-%{version}/userguide
 # and removing the .svn directories
 Source0: netpbm-%{version}.tar.xz
@@ -27,6 +27,7 @@ Patch13: netpbm-glibc.patch
 Patch14: netpbm-pnmtofiasco-stdin.patch
 Patch15: netpbm-svgtopam.patch
 Patch16: netpbm-ppmpat-segfault.patch
+Patch17: netpbm-pnmsmooth-segfault.patch
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: libjpeg-devel, libpng-devel, libtiff-devel, flex
 BuildRequires: libX11-devel, python, jasper-devel
@@ -84,6 +85,7 @@ netpbm-progs.  You'll also need to install the netpbm package.
 %patch14 -p1 -b .pnmtofiasco-stdin
 %patch15 -p1 -b .svgtopam
 %patch16 -p1 -b .ppmpat-segfault
+%patch17 -p1 -b .pnmsmooth-segfault
 
 sed -i 's/STRIPFLAG = -s/STRIPFLAG =/g' config.mk.in
 
@@ -111,11 +113,10 @@ sed -i 's/STRIPFLAG = -s/STRIPFLAG =/g' config.mk.in
 EOF
 
 TOP=`pwd`
-#	CFLAGS="$RPM_OPT_FLAGS -fPIC -flax-vector-conversions" \
 make \
 	CC="%{__cc}" \
 	LDFLAGS="-L$TOP/pbm -L$TOP/pgm -L$TOP/pnm -L$TOP/ppm" \
-	CFLAGS="-g3 -fPIC -flax-vector-conversions" \
+	CFLAGS="$RPM_OPT_FLAGS -fPIC -flax-vector-conversions" \
 	LADD="-lm" \
 	JPEGINC_DIR=%{_includedir} \
 	PNGINC_DIR=%{_includedir} \
@@ -213,6 +214,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/netpbm/
 
 %changelog
+* Mon Dec  7 2009 Jindrich Novy <jnovy@redhat.com> 10.47.04-3
+- fix segfault in pnmsmooth (#545089)
+
 * Fri Nov 27 2009 Jindrich Novy <jnovy@redhat.com> 10.47.04-2
 - fix ppmpat segfault when using -camo option (#541568)