diff --git a/japanese/Makefile b/japanese/Makefile
index 8c421a7bc345..4308df4a7e62 100644
--- a/japanese/Makefile
+++ b/japanese/Makefile
@@ -109,6 +109,9 @@
     SUBDIR += libjcode
     SUBDIR += libslang
     SUBDIR += lipsf
+    SUBDIR += lookup-emacs20
+    SUBDIR += lookup-mule
+    SUBDIR += lookup-xemacs
     SUBDIR += lynx
     SUBDIR += lynx-current
     SUBDIR += lyx