diff --git a/Python/getargs.c b/Python/getargs.c
index 960c68c..1370e09 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -663,6 +663,7 @@
 	}
 
 	case 'n': /* Py_ssize_t */
+#if SIZEOF_SIZE_T != SIZEOF_LONG
 	{
 		PyObject *iobj;
 		Py_ssize_t *p = va_arg(*p_va, Py_ssize_t *);
@@ -671,13 +672,14 @@
 			return converterr("integer<n>", arg, msgbuf, bufsize);
 		iobj = PyNumber_Index(arg);
 		if (iobj != NULL)
-			ival = PyLong_AsSsize_t(iobj);
+			ival = PyLong_AsSsize_t(arg);
 		if (ival == -1 && PyErr_Occurred())
 			return converterr("integer<n>", arg, msgbuf, bufsize);
 		*p = ival;
 		break;
 	}
-
+#endif
+	/* Fall through from 'n' to 'l' if Py_ssize_t is int */
 	case 'l': {/* long int */
 		long *p = va_arg(*p_va, long *);
 		long ival;