diff --git a/tbb-4.0-mfence.patch b/tbb-4.0-mfence.patch
index 09a89fc..a463bc9 100644
--- a/tbb-4.0-mfence.patch
+++ b/tbb-4.0-mfence.patch
@@ -6,7 +6,7 @@ diff -up tbb40_20110809oss/include/tbb/machine/linux_ia32.h\~ tbb40_20110809oss/
  #define __TBB_acquire_consistency_helper() __TBB_compiler_fence()
  #define __TBB_release_consistency_helper() __TBB_compiler_fence()
 -#define __TBB_full_memory_fence()          __asm__ __volatile__("mfence": : :"memory")
-+#define __TBB_full_memory_fence()          __TBB_full_memory_fence_imp
++#define __TBB_full_memory_fence()          __TBB_full_memory_fence_imp()
 +inline void __TBB_full_memory_fence_imp() {
 +    int tmp;
 +    __asm__ __volatile__("xchg %0,%0"
diff --git a/tbb.spec b/tbb.spec
index 7f526c4..dce10ba 100644
--- a/tbb.spec
+++ b/tbb.spec
@@ -10,7 +10,7 @@
 Summary: The Threading Building Blocks library abstracts low-level threading details
 Name: tbb
 Version: %{dotver}
-Release: 7.%{releasedate}%{?dist}
+Release: 8.%{releasedate}%{?dist}
 License: GPLv2 with exceptions
 Group: Development/Tools
 URL: http://threadingbuildingblocks.org/
@@ -143,6 +143,10 @@ rm -rf ${RPM_BUILD_ROOT}
 %doc %{source_5}
 
 %changelog
+* Wed May 22 2013 Petr Machata <pmachata@redhat.com> - 4.0-8.20120408
+- Fix mfence patch.  Since the __TBB_full_memory_fence macro was
+  function-call-like, it stole () intended for function invocation.
+
 * Fri Feb 15 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.0-7.20120408
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild