Issue #25923: Added more const qualifiers to signatures of static and private functions.
diff --git a/Include/bytes_methods.h b/Include/bytes_methods.h
index 11d5f42..dbc033c 100644
--- a/Include/bytes_methods.h
+++ b/Include/bytes_methods.h
@@ -17,9 +17,9 @@
/* These store their len sized answer in the given preallocated *result arg. */
extern void _Py_bytes_lower(char *result, const char *cptr, Py_ssize_t len);
extern void _Py_bytes_upper(char *result, const char *cptr, Py_ssize_t len);
-extern void _Py_bytes_title(char *result, char *s, Py_ssize_t len);
-extern void _Py_bytes_capitalize(char *result, char *s, Py_ssize_t len);
-extern void _Py_bytes_swapcase(char *result, char *s, Py_ssize_t len);
+extern void _Py_bytes_title(char *result, const char *s, Py_ssize_t len);
+extern void _Py_bytes_capitalize(char *result, const char *s, Py_ssize_t len);
+extern void _Py_bytes_swapcase(char *result, const char *s, Py_ssize_t len);
/* The maketrans() static method. */
extern PyObject* _Py_bytes_maketrans(Py_buffer *frm, Py_buffer *to);