diff --git a/include/boost/python/suite/indexing/container_utils.hpp b/include/boost/python/suite/indexing/container_utils.hpp
index a25185d0..72710bb8 100644
--- a/include/boost/python/suite/indexing/container_utils.hpp
+++ b/include/boost/python/suite/indexing/container_utils.hpp
@@ -7,9 +7,12 @@
 #ifndef PY_CONTAINER_UTILS_JDG20038_HPP
 # define PY_CONTAINER_UTILS_JDG20038_HPP
 
+# include <utility>
+# include <boost/foreach.hpp>
 # include <boost/python/object.hpp>
 # include <boost/python/handle.hpp>
 # include <boost/python/extract.hpp>
+# include <boost/python/stl_iterator.hpp>
 
 namespace boost { namespace python { namespace container_utils {
         
@@ -19,11 +22,13 @@ namespace boost { namespace python { namespace container_utils {
     {
         typedef typename Container::value_type data_type;
         
-        //  l must be a list or some container
-
-        for (int i = 0; i < l.attr("__len__")(); i++)
+        //  l must be iterable
+        BOOST_FOREACH(object elem,
+            std::make_pair(
+              boost::python::stl_input_iterator<object>(l),
+              boost::python::stl_input_iterator<object>()
+              ))
         {
-            object elem(l[i]);
             extract<data_type const&> x(elem);
             //  try if elem is an exact data_type type
             if (x.check())
diff --git a/test/vector_indexing_suite.py b/test/vector_indexing_suite.py
index 9bb75700..5fe2efe4 100644
--- a/test/vector_indexing_suite.py
+++ b/test/vector_indexing_suite.py
@@ -321,6 +321,19 @@ e
 >>> print_xvec(v)
 [ a b c d e f g h i j ]
 
+#####################################################################
+# extend using a generator expression
+#####################################################################
+>>> v[:] = ['a','b','c','d','e'] # reset again
+>>> def generator():
+...   addlist = ['f','g','h','i','j']
+...   for i in addlist:
+...     if i != 'g':
+...       yield i
+>>> v.extend(generator())
+>>> print_xvec(v)
+[ a b c d e f h i j ]
+
 #####################################################################
 # vector of strings
 #####################################################################