diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f768680e9652855d004d358c3ebb5d1ad0d55944..f77a30123cee291418bbd2201a587f41cfe1b9b1 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2010-01-03  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* include/profile/bitset (bitset<>::bitset(unsigned long long)): Add
+	in C++0x mode.
+	* include/debug/bitset (bitset<>::bitset(unsigned long long)):
+	Likewise.
+
 2010-01-03  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* include/tr1_impl/hashtable (_Hashtable<>): Remove insert_return_type
diff --git a/libstdc++-v3/include/debug/bitset b/libstdc++-v3/include/debug/bitset
index 734bf228654e3d16f79bd2a8cc40ac8483f621b5..e78eb5615734dea1e5ae213d28adb65ee0714d2a 100644
--- a/libstdc++-v3/include/debug/bitset
+++ b/libstdc++-v3/include/debug/bitset
@@ -1,6 +1,6 @@
 // Debugging bitset implementation -*- C++ -*-
 
-// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -120,7 +120,12 @@ namespace __debug
       // 23.3.5.1 constructors:
       bitset() : _Base() { }
 
-      bitset(unsigned long __val) : _Base(__val) { }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      bitset(unsigned long long __val)
+#else
+      bitset(unsigned long __val)
+#endif
+      : _Base(__val) { }
 
       template<typename _CharT, typename _Traits, typename _Alloc>
         explicit
diff --git a/libstdc++-v3/include/profile/bitset b/libstdc++-v3/include/profile/bitset
index 7df8d88d7a8f47101e4b306a40eca70b28711bd6..21464767331309bd4f6fbb9b5f4bc11e727b166a 100644
--- a/libstdc++-v3/include/profile/bitset
+++ b/libstdc++-v3/include/profile/bitset
@@ -1,6 +1,6 @@
 // Profiling bitset implementation -*- C++ -*-
 
-// Copyright (C) 2009 Free Software Foundation, Inc.
+// Copyright (C) 2009, 2010 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -97,7 +97,12 @@ namespace __profile
       // 23.3.5.1 constructors:
       bitset() : _Base() { }
 
-      bitset(unsigned long __val) : _Base(__val) { }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      bitset(unsigned long long __val)
+#else
+      bitset(unsigned long __val)
+#endif
+      : _Base(__val) { }
 
       template<typename _CharT, typename _Traits, typename _Alloc>
         explicit