diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 417bc48..5a45136 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -2557,7 +2557,8 @@
 \n\
 Return a copy of B with all occurrences of subsection\n\
 old replaced by new.  If the optional argument count is\n\
-given, only the first count occurrences are replaced.");
+positive, only the first count occurrences are replaced. A\n\
+negative value of count replaces all occurences");
 
 static PyObject *
 bytes_replace(PyBytesObject *self, PyObject *args)