diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f28bc5c4b42..b8c222ba807 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2011-11-07  Andrew MacLeod  <amacleod@redhat.com>
+
+	* include/bits/atomic_base.h (atomic_thread_fence): Revert.
+	(atomic_signal_fence): Revert.
+
 2011-11-07  Andrew MacLeod  <amacleod@redhat.com>
 
 	* include/bits/atomic_base.h (atomic_thread_fence): Call builtin.
diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h
index e297eb0e6ad..5327c1bfa21 100644
--- a/libstdc++-v3/include/bits/atomic_base.h
+++ b/libstdc++-v3/include/bits/atomic_base.h
@@ -69,16 +69,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   }
 
   void
-  atomic_thread_fence(memory_order __m) noexcept
-  {
-    __atomic_thread_fence (__m);
-  }
+  atomic_thread_fence(memory_order __m) noexcept;
 
   void
-  atomic_signal_fence(memory_order __m) noexcept
-  {
-    __atomic_signal_fence (__m);
-  }
+  atomic_signal_fence(memory_order __m) noexcept;
 
   /// kill_dependency
   template<typename _Tp>