diff --git a/Include/abstract.h b/Include/abstract.h
index de984e7..6f7116a 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -725,6 +725,11 @@
 	 This is equivalent to the Python expression: tuple(o)
        */
 
+     PyObject *PySequence_List Py_PROTO((PyObject *o));
+       /*
+       Returns the o as a list on success, and NULL on failure.
+       This is equivalent to the Python expression: list(o)
+       */
      int PySequence_Count Py_PROTO((PyObject *o, PyObject *value));
 
        /*