diff --git a/strace-4.8-ppc64.patch b/strace-4.8-ppc64.patch
new file mode 100644
index 0000000..26d9bf1
--- /dev/null
+++ b/strace-4.8-ppc64.patch
@@ -0,0 +1,66 @@
+commit 9afc2ee682d2f9fd3ad938756c841d7f0eed5f21
+Author: Anton Blanchard <anton@samba.org>
+Date:   Thu Jul 11 12:03:57 2013 +1000
+
+    powerpc: enhance 32/64bit detection
+    
+    We were using uname to determine if userspace was 32 or 64bit.
+    This fails when we have a 64bit kernel and a 32bit userspace.
+    
+    * configure.ac (powerpc*): Similar to x86, use a runtime test
+    to determine if we are 32 or 64bit.
+    
+    Signed-off-by: Anton Blanchard <anton@samba.org>
+
+diff --git a/configure.ac b/configure.ac
+index 03e49fe..b3b62e8 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -54,7 +54,11 @@ alpha*)
+ powerpc*)
+ 	arch=powerpc
+ 	AC_DEFINE([POWERPC], 1, [Define for the PowerPC architecture.])
+-	if test $host_cpu = powerpc64; then
++	AC_TRY_COMPILE(
++[#ifndef __LP64__
++# error 32 bit
++#endif], [], ppc_bits=64, ppc_bits=32)
++	if test "$ppc_bits" = "64"; then
+ 		AC_DEFINE([POWERPC64], 1, [Define for the PowerPC64 architecture.])
+ 	fi
+ 	;;
+diff -up strace-4.8/configure.ppc64 strace-4.8/configure
+--- strace-4.8/configure.ppc64	2013-06-05 02:02:43.000000000 +0200
++++ strace-4.8/configure	2014-07-25 16:16:01.000000000 +0200
+@@ -4660,10 +4660,29 @@ powerpc*)
+ 
+ $as_echo "#define POWERPC 1" >>confdefs.h
+ 
+-	if test $host_cpu = powerpc64; then
++	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++#ifndef __LP64__
++# error 32 bit
++#endif
++int
++main ()
++{
+ 
+-$as_echo "#define POWERPC64 1" >>confdefs.h
++  ;
++  return 0;
++}
++_ACEOF
++if ac_fn_c_try_compile "$LINENO"; then :
++  ppc_bits=64
++else
++  ppc_bits=32
++fi
++rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
++        if test "$ppc_bits" = "64"; then
+ 
++$as_echo "#define POWERPC64 1" >>confdefs.h
++  
+ 	fi
+ 	;;
+ arm*)
diff --git a/strace.spec b/strace.spec
index 63a43a1..643b4c1 100644
--- a/strace.spec
+++ b/strace.spec
@@ -1,13 +1,16 @@
 Summary: Tracks and displays system calls associated with a running process
 Name: strace
 Version: 4.8
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: BSD
 Group: Development/Debuggers
 
 URL: http://sourceforge.net/projects/strace/
 Source: http://downloads.sourceforge.net/strace/%{name}-%{version}.tar.xz
 Patch0: strace-fix-ftbfs.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=1122323
+# http://sourceforge.net/p/strace/code/ci/9afc2ee682d2f9fd3ad938756c841d7f0eed5f21/
+Patch1: strace-4.8-ppc64.patch
 
 BuildRequires: libacl-devel, libaio-devel, time
 
@@ -45,6 +48,7 @@ The `strace' program in the `strace' package is for 32-bit processes.
 %prep
 %setup -q
 %patch0 -p1 -b .ftbfs
+%patch1 -p1 -b .ppc64
 
 %build
 %configure
@@ -82,6 +86,9 @@ make check
 %endif
 
 %changelog
+* Fri Jul 25 2014 Dan Horák <dan[at]danny.cz> - 4.8-5
+- update for ppc64
+
 * Sun Jun 08 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.8-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild