Use Py_ssize_t for counts and sizes.
diff --git a/Modules/_bisectmodule.c b/Modules/_bisectmodule.c
index e40297d..64fc046 100644
--- a/Modules/_bisectmodule.c
+++ b/Modules/_bisectmodule.c
@@ -6,10 +6,10 @@
 #include "Python.h"
 
 static int
-internal_bisect_right(PyObject *list, PyObject *item, int lo, int hi)
+internal_bisect_right(PyObject *list, PyObject *item, Py_ssize_t lo, Py_ssize_t hi)
 {
 	PyObject *litem;
-	int mid, res;
+	Py_ssize_t mid, res;
 
 	if (hi == -1) {
 		hi = PySequence_Size(list);