--- a/Makefile	2018-09-17 16:24:15.000000000 +0200
+++ b/Makefile	2019-10-19 00:05:32.652384943 +0200
@@ -90,8 +90,6 @@
       endif
     endif
   endif
-else
-  CFLAGS += -O
 endif
 
 ifdef DEBUG