diff --git a/src/Make_morph.mak b/src/Make_morph.mak
index 15a7477..2f2f08b 100644
--- a/src/Make_morph.mak
+++ b/src/Make_morph.mak
@@ -43,6 +43,7 @@
 	getchar.c						\
 	hardcopy.c						\
 	hashtab.c						\
+	json.c							\
 	main.c							\
 	mark.c							\
 	mbyte.c							\