diff --git a/enc/depend b/enc/depend
index 1d42dac15f..092d09b055 100644
--- a/enc/depend
+++ b/enc/depend
@@ -193,6 +193,13 @@ enc/big5.$(OBJEXT): enc/big5.c
 enc/big5.$(OBJEXT): missing.h
 enc/big5.$(OBJEXT): onigmo.h
 enc/big5.$(OBJEXT): oniguruma.h
+enc/cesu_8.$(OBJEXT): $(top_srcdir)/encindex.h
+enc/cesu_8.$(OBJEXT): $(top_srcdir)/regenc.h
+enc/cesu_8.$(OBJEXT): config.h
+enc/cesu_8.$(OBJEXT): defines.h
+enc/cesu_8.$(OBJEXT): enc/cesu_8.c
+enc/cesu_8.$(OBJEXT): missing.h
+enc/cesu_8.$(OBJEXT): onigmo.h
 enc/cp949.$(OBJEXT): $(top_srcdir)/regenc.h
 enc/cp949.$(OBJEXT): config.h
 enc/cp949.$(OBJEXT): defines.h
diff --git a/ext/racc/cparse/depend b/ext/racc/cparse/depend
index 441d4df0f7..8d8a3a7d26 100644
--- a/ext/racc/cparse/depend
+++ b/ext/racc/cparse/depend
@@ -1,6 +1,7 @@
 # AUTOGENERATED DEPENDENCIES START
 cparse.o: $(RUBY_EXTCONF_H)
 cparse.o: $(arch_hdrdir)/ruby/config.h
+cparse.o: $(hdrdir)/ruby.h
 cparse.o: $(hdrdir)/ruby/backward.h
 cparse.o: $(hdrdir)/ruby/defines.h
 cparse.o: $(hdrdir)/ruby/intern.h