diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index f5ab5432b9..ee67703ecb 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,7 @@
+2020-12-18  Hannes Domani  <ssbssa@yahoo.de>
+
+	* python.texi (TUI Windows In Python): Remove erroneous 'a'.
+
 2020-12-18  Hannes Domani  <ssbssa@yahoo.de>
 
 	* python.texi (Values From Inferior): Document the address keyword.
diff --git a/gdb/doc/python.texi b/gdb/doc/python.texi
index ad7df2cdd3..11cc877125 100644
--- a/gdb/doc/python.texi
+++ b/gdb/doc/python.texi
@@ -5834,7 +5834,7 @@ window.  This is called with a single argument of type
 that implements the TUI window protocol, also described below.
 @end defun
 
-As mentioned above, when a factory function is called, it is passed a
+As mentioned above, when a factory function is called, it is passed
 an object of type @code{gdb.TuiWindow}.  This object has these
 methods and attributes: