diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 81a6a7511abea5..d3eeb0ce5a8c11 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1234,7 +1234,7 @@ Mutable sequence types also support the following methods:
    :no-typesetting:
 .. method:: sequence.append(value, /)
 
-   Append *value* to the end of the sequence
+   Append *value* to the end of the sequence.
    This is equivalent to writing ``seq[len(seq):len(seq)] = [value]``.
 
 .. method:: bytearray.clear()