diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 2dbe283..6fbaba5 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1225,7 +1225,7 @@
 		p = strchr(path, delim);
 		if (p == NULL)
 			p = strchr(path, '\0'); /* End of string */
-		w = PyString_FromStringAndSize(path, (int) (p - path));
+		w = PyString_FromStringAndSize(path, (Py_ssize_t) (p - path));
 		if (w == NULL) {
 			Py_DECREF(v);
 			return NULL;