Index: boost/python/detail/caller.hpp
===================================================================
--- boost/python/detail/caller.hpp	(revision 66590)
+++ boost/python/detail/caller.hpp	(working copy)
@@ -52,7 +52,7 @@
 
 inline unsigned arity(PyObject* const& args_)
 {
-    return PyTuple_GET_SIZE(args_);
+    return static_cast<unsigned>(PyTuple_GET_SIZE(args_));
 }
 
 // This "result converter" is really just used as
Index: boost/python/suite/indexing/detail/indexing_suite_detail.hpp
===================================================================
--- boost/python/suite/indexing/detail/indexing_suite_detail.hpp	(revision 66590)
+++ boost/python/suite/indexing/detail/indexing_suite_detail.hpp	(working copy)
@@ -600,9 +600,9 @@
                 from_ = min_index;
             }
             else {
-                long from = extract<long>( slice->start);
+                Py_ssize_t from = extract<Py_ssize_t>(slice->start);
                 if (from < 0) // Negative slice index
-                    from += max_index;
+                    from += Py_ssize_t(max_index);
                 if (from < 0) // Clip lower bounds to zero
                     from = 0;
                 from_ = boost::numeric_cast<Index>(from);
@@ -614,9 +614,9 @@
                 to_ = max_index;
             }
             else {
-                long to = extract<long>( slice->stop);
+                Py_ssize_t to = extract<Py_ssize_t>(slice->stop);
                 if (to < 0)
-                    to += max_index;
+                    to += Py_ssize_t(max_index);
                 if (to < 0)
                     to = 0;
                 to_ = boost::numeric_cast<Index>(to);