from __future__ import with_statement addon for 'with', mostly written by
Neal.
diff --git a/Python/compile.c b/Python/compile.c
index 78ae6a7..13e0f6d 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -4286,6 +4286,8 @@
 		flags |= CO_GENERATOR;
         if (c->c_flags->cf_flags & CO_FUTURE_DIVISION)
                 flags |= CO_FUTURE_DIVISION;
+        if (c->c_flags->cf_flags & CO_FUTURE_WITH_STATEMENT)
+                flags |= CO_FUTURE_WITH_STATEMENT;
 	n = PyDict_Size(c->u->u_freevars);
 	if (n < 0)
 	    return -1;