Fix typo.
diff --git a/Doc/howto/unicode.rst b/Doc/howto/unicode.rst
index 3b33772..2439cdb 100644
--- a/Doc/howto/unicode.rst
+++ b/Doc/howto/unicode.rst
@@ -543,7 +543,7 @@
The first list contains UTF-8-encoded filenames, and the second list contains
the Unicode versions.
-Note that in most occasions, the Uniode APIs should be used. The bytes APIs
+Note that in most occasions, the Unicode APIs should be used. The bytes APIs
should only be used on systems where undecodable file names can be present,
i.e. Unix systems.