diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 5641a782196..3110601701b 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,9 @@
+2009-07-08  Janis Johnson  <janis187@us.ibm.com>
+
+	PR libstdc++/40691
+	* include/bugs/valarray-after.h (_Expr::operator!): Fix return type.
+	* testsuite/26_numerics/valarray/40691.cc: New test.
+
 2009-07-06  Benjamin Kosnik  <bkoz@redhat.com>
 
 	*  testsuite/21_strings/c_strings/wchar_t/3.cc: Add copyright.
diff --git a/libstdc++-v3/include/bits/valarray_after.h b/libstdc++-v3/include/bits/valarray_after.h
index 8a6a2568eed..e4093f1b695 100644
--- a/libstdc++-v3/include/bits/valarray_after.h
+++ b/libstdc++-v3/include/bits/valarray_after.h
@@ -315,7 +315,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
     _Expr<_Dom, _Tp>::operator!() const
     {
       typedef _UnClos<__logical_not, std::_Expr, _Dom> _Closure;
-      return _Expr<_Closure, _Tp>(_Closure(this->_M_closure));
+      return _Expr<_Closure, bool>(_Closure(this->_M_closure));
     }
 
 #define _DEFINE_EXPR_UNARY_OPERATOR(_Op, _Name)                           \
diff --git a/libstdc++-v3/testsuite/26_numerics/valarray/40691.cc b/libstdc++-v3/testsuite/26_numerics/valarray/40691.cc
new file mode 100644
index 00000000000..5524835a6cc
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/valarray/40691.cc
@@ -0,0 +1,39 @@
+// Copyright (C) 2009 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
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do compile }
+
+#include <valarray>
+
+// PR libstdc++/40691
+void test01()
+{
+  const std::valarray<int> vi(12);
+  std::valarray<bool> vb1(12);
+  std::valarray<bool> vb2(3);
+  std::slice s(0,3,4);
+
+  vb1 = !vi;
+  vb2 = !(std::valarray<int>)vi[s];
+  vb2 = !vi[s];
+}
+
+int main()
+{
+  test01();
+  return 0;
+}