diff --git a/mingw-w64-runtime-1.0b.20100818-assembly.patch b/mingw-w64-runtime-1.0b.20100818-assembly.patch
new file mode 100644
index 0000000..fe62847
--- /dev/null
+++ b/mingw-w64-runtime-1.0b.20100818-assembly.patch
@@ -0,0 +1,12 @@
+diff -urEbwB mingw-w64-runtime-1.0b.20100818/math/scalbnl.S mingw-w64-runtime-1.0b.20100818/math/scalbnl.S
+--- mingw-w64-runtime-1.0b.20100818/math/scalbnl.S	2010-05-03 12:25:18.000000000 +0200
++++ mingw-w64-runtime-1.0b.20100818/math/scalbnl.S	2010-09-24 01:47:59.000000000 +0200
+@@ -17,7 +17,7 @@
+ __MINGW_USYMBOL(scalbnl):
+ #ifdef _WIN64
+ 	subq  $24, %rsp
+-	andq    $0xffffffff, %r8
++	andl    $-1, %r8d
+ 	movq	%r8, (%rsp)
+ 	fildl	(%rsp)
+ 	fldt	(%rdx)
diff --git a/mingw64-runtime.spec b/mingw64-runtime.spec
index 47dbffb..24c16c1 100644
--- a/mingw64-runtime.spec
+++ b/mingw64-runtime.spec
@@ -12,9 +12,10 @@ Summary:        MinGW-W64 runtime for win32
 
 License:        Public Domain
 Group:          Development/Libraries
-URL:            http://www.mingw.org/
+URL:            http://mingw-w64.sourceforge.net/
 Source0:        http://dl.sourceforge.net/sourceforge/mingw-w64/mingw-w64-runtime-%{version}.tar.bz2
 Source100:      %{name}-rpmlintrc
+Patch0:         mingw-w64-runtime-1.0b.20100818-assembly.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildArch:      noarch
@@ -36,10 +37,10 @@ MinGW Win64 cross-compiler runtime, base libraries.
 
 %prep
 %setup -q -n mingw-w64-runtime-%{version}
+%patch0 -p1
 
 
 %build
-autoreconf -fi
 ./configure --host=%{_mingw64_target} --prefix=%{_prefix} --with-sysroot=%{_mingw64_sysroot} --disable-lib32 --enable-lib64
 make