diff --git a/Makefile.in b/Makefile.in
index b82761532..98a4794f8 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -185,7 +185,7 @@ TAGS: $(SRCS)
 	etags $(SRCS)
 
 clean:
-	-rm -f y.tab.[ch] *.o $(PROGS) testsudoers core
+	-rm -f y.tab.[ch] *.o $(PROGS) testsudoers core sudo.core visudo.core
 
 mostlyclean: clean