--- a/Makefile
+++ b/Makefile
@@ -290,6 +290,11 @@
 .PHONY: clean uninstall
 
 clean:
-	rm -f *.o *~
+	find -name '*~' -exec rm -f {} \;
+	find -name '*.[oa]' -exec rm -f {} \;
 	rm -f $(TARGET)
 
+beauty:
+	find -name '*.[ch]' -exec indent {} \;
+	find -name '*.[ch]' -exec eraser {} \;
+	@make clean