diff --git a/Makefile b/Makefile
index 9f93b0b..28e4580 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@ $(WOBJ):
 	$(CC) $(WEBEXTCFLAGS) $(CFLAGS) -c $(@:.o=.c)
 
 clean:
-	rm -f surf $(OBJ)
+	rm -f surf config.h $(OBJ)
 	rm -f $(WLIB) $(WOBJ)
 
 distclean: clean