diff --git a/Include/bytesobject.h b/Include/bytesobject.h
index 916e3f7..3c69d25 100644
--- a/Include/bytesobject.h
+++ b/Include/bytesobject.h
@@ -29,7 +29,7 @@
 
 typedef struct {
     PyObject_VAR_HEAD
-    long ob_shash;
+    Py_hash_t ob_shash;
     char ob_sval[1];
 
     /* Invariants: