diff --git a/src/programs/mtree/Makefile.in b/src/programs/mtree/Makefile.in
index d8d57d8c5..fde40fc72 100644
--- a/src/programs/mtree/Makefile.in
+++ b/src/programs/mtree/Makefile.in
@@ -54,7 +54,7 @@ bits: bits.o
 	$(COMPILE) -c $< -o $@
 
 clean:
-	rm -f ${OBJS} ${PROG}
+	rm -f ${OBJS} ${PROG} digest-types.h bits
 
 distclean: clean
 	rm -f Makefile config.h config.status config.log