diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 6f34037..bf7c7da 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -2416,18 +2416,36 @@
     return NULL;
 }
 
-PyDoc_STRVAR(hex__doc__,
-"B.hex() -> string\n\
-\n\
-Create a string of hexadecimal numbers from a bytes object.\n\
-Example: b'\\xb9\\x01\\xef'.hex() -> 'b901ef'.");
+/*[clinic input]
+bytes.hex
+
+    sep: object = NULL
+        An optional single character or byte to separate hex bytes.
+    bytes_per_sep: int = 1
+        How many bytes between separators.  Positive values count from the
+        right, negative values count from the left.
+
+Create a str of hexadecimal numbers from a bytes object.
+
+Example:
+>>> value = b'\xb9\x01\xef'
+>>> value.hex()
+'b901ef'
+>>> value.hex(':')
+'b9:01:ef'
+>>> value.hex(':', 2)
+'b9:01ef'
+>>> value.hex(':', -2)
+'b901:ef'
+[clinic start generated code]*/
 
 static PyObject *
-bytes_hex(PyBytesObject *self, PyObject *Py_UNUSED(ignored))
+bytes_hex_impl(PyBytesObject *self, PyObject *sep, int bytes_per_sep)
+/*[clinic end generated code: output=1f134da504064139 input=f1238d3455990218]*/
 {
     char* argbuf = PyBytes_AS_STRING(self);
     Py_ssize_t arglen = PyBytes_GET_SIZE(self);
-    return _Py_strhex(argbuf, arglen);
+    return _Py_strhex_with_sep(argbuf, arglen, sep, bytes_per_sep);
 }
 
 static PyObject *
@@ -2452,7 +2470,7 @@
     {"find", (PyCFunction)bytes_find, METH_VARARGS,
      _Py_find__doc__},
     BYTES_FROMHEX_METHODDEF
-    {"hex", (PyCFunction)bytes_hex, METH_NOARGS, hex__doc__},
+    BYTES_HEX_METHODDEF
     {"index", (PyCFunction)bytes_index, METH_VARARGS, _Py_index__doc__},
     {"isalnum", stringlib_isalnum, METH_NOARGS,
      _Py_isalnum__doc__},