diff --git a/netpbm-10.35-64bitfix.patch b/netpbm-10.35-64bitfix.patch
new file mode 100644
index 0000000..3a19ea4
--- /dev/null
+++ b/netpbm-10.35-64bitfix.patch
@@ -0,0 +1,21 @@
+diff -up netpbm-10.35.58/lib/libpm.c.64bitfix netpbm-10.35.58/lib/libpm.c
+--- netpbm-10.35.58/lib/libpm.c.64bitfix	2009-01-22 08:49:25.000000000 +0100
++++ netpbm-10.35.58/lib/libpm.c	2009-01-22 08:50:38.000000000 +0100
+@@ -1069,7 +1069,7 @@
+ pm_readbiglong(FILE * const ifP, 
+                long * const lP) {
+ 
+-    int c;
++    unsigned int c;
+     unsigned long l;
+ 
+     c = getc(ifP);
+@@ -1148,7 +1148,7 @@
+ int
+ pm_readlittlelong(FILE * const ifP, 
+                   long * const lP) {
+-    int c;
++    unsigned int c;
+     unsigned long l;
+ 
+     c = getc(ifP);
diff --git a/netpbm.spec b/netpbm.spec
index e61d525..3d1f667 100644
--- a/netpbm.spec
+++ b/netpbm.spec
@@ -1,7 +1,7 @@
 Summary: A library for handling different graphics file formats
 Name: netpbm
 Version: 10.35.58
-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
@@ -33,6 +33,7 @@ Patch20: netpbm-10.35-rgbtxt.patch
 Patch21: netpbm-10.35-pamtosvgsegfault.patch
 Patch22: netpbm-10.35-pnmmontagefix.patch
 Patch23: netpbm-10.35-pnmtofiasco-stdin.patch
+Patch24: netpbm-10.35-64bitfix.patch
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: libjpeg-devel, libpng-devel, libtiff-devel, flex
 BuildRequires: libX11-devel, python, jasper-devel
@@ -96,6 +97,7 @@ netpbm-progs.  You'll also need to install the netpbm package.
 %patch21 -p1 -b .pamtosvgsegfault
 %patch22 -p1 -b .pnmmontagefix
 %patch23 -p1 -b .pnmtofiasco-stdin
+%patch24 -p1 -b .64bitfix
 
 ##mv shhopt/shhopt.h shhopt/pbmshhopt.h
 ##perl -pi -e 's|shhopt.h|pbmshhopt.h|g' `find -name "*.c" -o -name "*.h"` ./GNUmakefile
@@ -223,6 +225,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_datadir}/netpbm/
 
 %changelog
+* Thu Jan 22 2009 Jindrich Novy <jnovy@redhat.com> 10.35.58-3
+- fix cmuwmtopbm and other utilities by making endianess
+  functions work correctly on 64bit systems (#476863)
+
 * Wed Jan 21 2009 Jindrich Novy <jnovy@redhat.com> 10.35.58-2
 - fix pnmtofiasco to accept image from stdin (#476989, #227283)