diff --git a/qt-everywhere-opensource-src-4.6.2-webkit-s390x.patch b/qt-everywhere-opensource-src-4.6.2-webkit-s390x.patch
new file mode 100644
index 0000000..37e8abb
--- /dev/null
+++ b/qt-everywhere-opensource-src-4.6.2-webkit-s390x.patch
@@ -0,0 +1,48 @@
+diff -up qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h.than qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h
+--- qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h.than	2010-02-11 16:55:20.000000000 +0100
++++ qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h	2010-03-23 14:29:41.000000000 +0100
+@@ -345,6 +345,11 @@
+ #define WTF_PLATFORM_BIG_ENDIAN 1
+ #endif
+ 
++/* PLATFORM(S390X) */
++#if defined(__s390x__) || defined(__s390x)
++#define WTF_PLATFORM_S390X 1
++#endif
++
+ /* PLATFORM(IA64) */
+ /* a.k.a. Itanium Processor Family, IPF */
+ #if defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
+@@ -730,6 +735,8 @@
+ /* Using JSVALUE32_64 causes padding/alignement issues for JITStubArg
+ on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
+ #define WTF_USE_JSVALUE32 1
++#elif PLATFORM(S390X)
++#define WTF_USE_JSVALUE64 1
+ #else
+ #define WTF_USE_JSVALUE32_64 1
+ #endif
+diff -up qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h.than qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h
+--- qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h.than	2010-02-11 16:55:17.000000000 +0100
++++ qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h	2010-03-23 14:19:00.000000000 +0100
+@@ -362,6 +362,11 @@
+ #define WTF_PLATFORM_IA64 1
+ #endif
+ 
++/* PLATFORM(S390X) */
++#if defined(__s390x__) || defined(__s390x)
++#define WTF_PLATFORM_S390X 1
++#endif
++
+ /* PLATFORM(ALPHA) */
+ #if defined(__alpha__)
+ #define WTF_PLATFORM_ALPHA 1
+@@ -729,7 +734,7 @@
+ #endif
+ 
+ #if !defined(WTF_USE_JSVALUE64) && !defined(WTF_USE_JSVALUE32) && !defined(WTF_USE_JSVALUE32_64)
+-#if (PLATFORM(X86_64) && (PLATFORM(UNIX) || PLATFORM(WIN_OS))) || PLATFORM(IA64) || PLATFORM(ALPHA)
++#if (PLATFORM(X86_64) && (PLATFORM(UNIX) || PLATFORM(WIN_OS))) || PLATFORM(IA64) || PLATFORM(ALPHA) || PLATFORM(S390X)
+ #define WTF_USE_JSVALUE64 1
+ #elif PLATFORM(ARM) || PLATFORM(PPC64)
+ #define WTF_USE_JSVALUE32 1
diff --git a/qt.spec b/qt.spec
index da10fa5..e116596 100644
--- a/qt.spec
+++ b/qt.spec
@@ -13,7 +13,7 @@ Summary: Qt toolkit
 Name:    qt
 Epoch:   1
 Version: 4.6.2
-Release: 9%{?dist}
+Release: 10%{?dist}
 
 # See LGPL_EXCEPTIONS.txt, LICENSE.GPL3, respectively, for exception details
 License: LGPLv2 with exceptions or GPLv3 with exceptions
@@ -58,6 +58,8 @@ Patch53: qt-x11-opensource-src-4.5.0-fix-qatomic-inline-asm.patch
 Patch54: qt-x11-opensource-src-4.5.1-mysql_config.patch
 # http://bugs.kde.org/show_bug.cgi?id=180051#c22
 Patch55: qt-everywhere-opensource-src-4.6.2-cups.patch
+# fix type cast issue on s390x
+Patch56: qt-everywhere-opensource-src-4.6.2-webkit-s390x.patch
 
 # security patches
 Patch100: qt-x11-opensource-src-4.5.3-cve-2010-0046-css-format-mem-corruption.patch
@@ -417,6 +419,7 @@ Qt libraries used for drawing widgets and OpenGL items.
 ## TODO: upstream me
 %patch54 -p1 -b .mysql_config
 %patch55 -p1 -b .cups-1
+%patch56 -p1 -b .typecast_s390x
 
 # security fixes
 %patch100 -p1 -b .cve-2010-0046-css-format-mem-corruption
@@ -1033,6 +1036,9 @@ fi
 
 
 %changelog
+* Tue Mar 23 2010 Than Ngo <than@redhat.com> - 4.6.2-10
+- fix type cast issue on s390x
+
 * Mon Mar 22 2010 Than Ngo <than@redhat.com> - 4.6.2-9
 - backport patch to fix ix a crash when reparenting an item
   in QGraphicsView, QTBUG-6932