diff --git a/Makefile b/Makefile
index 5d497f9..47dd566 100644
--- a/Makefile
+++ b/Makefile
@@ -23,3 +23,7 @@ cescal: $(OFILES)
 -include $(DFILES)
 %.o: %.c
 	$(CC) -c $< $(CFLAGS) -o $@
+
+.PHONY: clean
+clean:
+	rm -f $(OFILES) $(DFILES)