diff --git a/japanese/Makefile b/japanese/Makefile
index 1fd6cf18273a..7614b4a66342 100644
--- a/japanese/Makefile
+++ b/japanese/Makefile
@@ -276,6 +276,7 @@
     SUBDIR += pejv-fpw
     SUBDIR += perl5
     SUBDIR += pgp.language
+    SUBDIR += php_doc
     SUBDIR += pine
     SUBDIR += plain2
     SUBDIR += plan