diff --git a/extending/newtypes_tutorial.po b/extending/newtypes_tutorial.po
index 525d9b3a7b..4f6a0caec2 100644
--- a/extending/newtypes_tutorial.po
+++ b/extending/newtypes_tutorial.po
@@ -16,7 +16,7 @@ msgstr ""
 
 #: ../../extending/newtypes_tutorial.rst:7
 msgid "Defining Extension Types: Tutorial"
-msgstr ""
+msgstr "擴充型別定義教學"
 
 #: ../../extending/newtypes_tutorial.rst:14
 msgid ""