diff --git a/gnuradio-3.6.5-bigendian.patch b/gnuradio-3.6.5-bigendian.patch
new file mode 100644
index 0000000..7f1bb15
--- /dev/null
+++ b/gnuradio-3.6.5-bigendian.patch
@@ -0,0 +1,21 @@
+diff -up gnuradio-3.6.5/gr-blocks/lib/wavfile.cc.bigendian gnuradio-3.6.5/gr-blocks/lib/wavfile.cc
+--- gnuradio-3.6.5/gr-blocks/lib/wavfile.cc.bigendian	2013-06-12 13:41:54.000000000 +0200
++++ gnuradio-3.6.5/gr-blocks/lib/wavfile.cc	2013-06-12 13:42:22.000000000 +0200
+@@ -38,14 +38,14 @@ namespace gr {
+     // Define host to/from worknet (little endian) short and long
+ #ifdef BOOST_BIG_ENDIAN
+ 
+-    static inline uint16_t __wav_bs16(uint16_t x)
++    static inline uint16_t __gri_wav_bs16(uint16_t x)
+     {
+       return (x>>8) | (x<<8);
+     }
+ 
+-    static inline uint32_t __wav_bs32(uint32_t x)
++    static inline uint32_t __gri_wav_bs32(uint32_t x)
+     {
+-      return (uint32_t(__wav_bs16(uint16_t(x&0xfffful)))<<16) | (__wav_bs16(uint16_t(x>>16)));
++      return (uint32_t(__gri_wav_bs16(uint16_t(x&0xfffful)))<<16) | (__gri_wav_bs16(uint16_t(x>>16)));
+     }
+ 
+     #define htowl(x) __gri_wav_bs32(x)
diff --git a/gnuradio.spec b/gnuradio.spec
index f99368d..138c21e 100644
--- a/gnuradio.spec
+++ b/gnuradio.spec
@@ -19,7 +19,7 @@
 
 Name:		gnuradio
 Version:	3.6.5
-Release:	1%{?dist}
+Release:	2%{?dist}
 Summary:	Software defined radio framework
 
 Group:		Applications/Engineering
@@ -52,6 +52,8 @@ Obsoletes:	grc < 0.80-1
 # Make cmake modules installation directory configurable,
 # patch sent upstream, ticket 548
 Patch0:		gnuradio-3.6.5-cmake-modules-fix.patch
+# big endian fix
+Patch1:		gnuradio-3.6.5-bigendian.patch
 
 %description
 GNU Radio is a collection of software that when combined with minimal 
@@ -90,6 +92,7 @@ GNU Radio examples
 %setup -q
 
 %patch0 -p1 -b .cmake-modules-fix
+%patch1 -p1 -b .bigendian
 
 #force regeneration of cached moc output files
 find . -name "*_moc.cc" -exec rm {} \;
@@ -167,6 +170,9 @@ rm -rf %{buildroot}
 %{_datadir}/gnuradio/examples
 
 %changelog
+* Wed Jun 12 2013 Dan Horák <dan[at]danny.cz> - 3.6.5-2
+- fix build on big endian arches
+
 * Tue Jun  4 2013 Jaroslav Škarvada <jskarvad@redhat.com> - 3.6.5-1
 - New version
   Resolves: rhbz#967804