diff --git a/chicken-conf.scm b/chicken-conf.scm
index 783a61f..6a3142a 100644
--- a/chicken-conf.scm
+++ b/chicken-conf.scm
@@ -1,4 +1,4 @@
 (define (dynld-name fn)		
   (make-pathname #f fn ##sys#load-dynamic-extension))	
 
-(define genturfahi-cscflags  `(-O2 -d1))
+(define genturfahi-cscflags  `(-d2))