diff --git a/mingw-w64-headers-1.0b.20100818-namelessunion.patch b/mingw-w64-headers-1.0b.20100818-namelessunion.patch
new file mode 100644
index 0000000..ae3059e
--- /dev/null
+++ b/mingw-w64-headers-1.0b.20100818-namelessunion.patch
@@ -0,0 +1,11 @@
+--- include/winnt.h	(revision 3516)
++++ include/winnt.h	(revision 3517)
+@@ -3121,7 +3121,7 @@
+       __MINGW_EXTENSION union {
+ 	PVOID FiberData;
+ 	DWORD Version;
+-      } DUMMYUNIONNAME;
++      };
+       PVOID ArbitraryUserPointer;
+       struct _NT_TIB *Self;
+     } NT_TIB;
diff --git a/mingw32-headers.spec b/mingw32-headers.spec
index 2ef0739..043cdfb 100644
--- a/mingw32-headers.spec
+++ b/mingw32-headers.spec
@@ -12,6 +12,7 @@ URL:            http://www.mingw.org/
 Source0:        mingw-w64-headers-%{version}.tar.bz2
 Source1000:     %{name}-rpmlintrc
 Patch0:         mingw-w64-headers-1.0b.20100818-uow.patch
+Patch0:         mingw-w64-headers-1.0b.20100818-namelessunion.patch
 
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
@@ -27,6 +28,7 @@ MinGW Win64 headers.
 %prep
 %setup -q -n mingw-w64-headers-%{version}
 %patch0 -p1
+%patch1 -p0
 
 %build
 ./configure --host=%{_mingw32_target} \