Issue #19668: Added support for the cp1125 encoding.
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index ef79918..843de27 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -1027,6 +1027,10 @@
 +-----------------+--------------------------------+--------------------------------+
 | cp1026          | ibm1026                        | Turkish                        |
 +-----------------+--------------------------------+--------------------------------+
+| cp1125          | 1125, ibm1125, cp866u, ruscii  | Ukrainian                      |
+|                 |                                |                                |
+|                 |                                | .. versionadded:: 3.4          |
++-----------------+--------------------------------+--------------------------------+
 | cp1140          | ibm1140                        | Western Europe                 |
 +-----------------+--------------------------------+--------------------------------+
 | cp1250          | windows-1250                   | Central and Eastern Europe     |