diff --git a/webrtc-audio-processing.changes b/webrtc-audio-processing.changes
index f57b381..ebf563b 100644
--- a/webrtc-audio-processing.changes
+++ b/webrtc-audio-processing.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Dec 19 10:39:23 CET 2012 - ro@suse.de
+
+- add s390 and s390x to known platforms 
+  by adding webrtc-s390x.patch
+
 -------------------------------------------------------------------
 Tue Jul  3 15:00:06 UTC 2012 - dvaleev@suse.com
 
diff --git a/webrtc-audio-processing.spec b/webrtc-audio-processing.spec
index 72694f3..70a853d 100644
--- a/webrtc-audio-processing.spec
+++ b/webrtc-audio-processing.spec
@@ -39,6 +39,7 @@ BuildRequires:  make
 BuildRequires:  pkgconfig
 BuildRequires:  xz
 Patch0:         webrtc-ppc64.patch
+Patch1:         webrtc-s390x.patch
 
 %description
 WebRTC is an open source project that enables web browsers with Real-Time
@@ -87,6 +88,7 @@ WebRTC implements the W3C's proposal for video conferencing on the web.
 xz --decompress --stdout "%{SOURCE0}" | %__tar xf - --strip-components=1
 %__sed -i 's/\r$//' AUTHORS
 %patch0 -p1
+%patch1
 
 %build
 %configure
diff --git a/webrtc-s390x.patch b/webrtc-s390x.patch
new file mode 100644
index 0000000..3c7f8dc
--- /dev/null
+++ b/webrtc-s390x.patch
@@ -0,0 +1,15 @@
+--- src/typedefs.h
++++ src/typedefs.h
+@@ -82,6 +82,12 @@
+ #elif defined(__powerpc__)
+ #define WEBRTC_BIG_ENDIAN
+ #define WEBRTC_ARCH_32_BITS
++#elif defined(__s390x__)
++#define WEBRTC_BIG_ENDIAN
++#define WEBRTC_ARCH_64_BITS
++#elif defined(__s390__)
++#define WEBRTC_BIG_ENDIAN
++#define WEBRTC_ARCH_32_BITS
+ #else
+ #error Please add support for your architecture in typedefs.h
+ #endif