diff --git a/ext/nkf/depend b/ext/nkf/depend
deleted file mode 100644
index 82580ff..0000000
--- a/ext/nkf/depend
+++ /dev/null
@@ -1,25 +0,0 @@
-# BSD make needs "nkf.o: nkf.c" dependency BEFORE "nkf.o: nkf-utf8/nkf.c".
-# It seems BSD make searches the target for implicit rule in dependencies at first.
-nkf.o: nkf.c
-
-# AUTOGENERATED DEPENDENCIES START
-nkf.o: $(RUBY_EXTCONF_H)
-nkf.o: $(arch_hdrdir)/ruby/config.h
-nkf.o: $(hdrdir)/ruby/assert.h
-nkf.o: $(hdrdir)/ruby/backward.h
-nkf.o: $(hdrdir)/ruby/defines.h
-nkf.o: $(hdrdir)/ruby/encoding.h
-nkf.o: $(hdrdir)/ruby/intern.h
-nkf.o: $(hdrdir)/ruby/missing.h
-nkf.o: $(hdrdir)/ruby/onigmo.h
-nkf.o: $(hdrdir)/ruby/oniguruma.h
-nkf.o: $(hdrdir)/ruby/ruby.h
-nkf.o: $(hdrdir)/ruby/st.h
-nkf.o: $(hdrdir)/ruby/subst.h
-nkf.o: nkf-utf8/config.h
-nkf.o: nkf-utf8/nkf.c
-nkf.o: nkf-utf8/nkf.h
-nkf.o: nkf-utf8/utf8tbl.c
-nkf.o: nkf-utf8/utf8tbl.h
-nkf.o: nkf.c
-# AUTOGENERATED DEPENDENCIES END