Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -98,7 +98,7 @@ ifeq (${DEBUG}, YES)
 CXXFLAGS+=-g -Wall -pedantic 
 else
 # release stuff
-CXXFLAGS+=-Ofast ${OPTFLAGS} -DNDEBUG
+CXXFLAGS+=${OPTFLAGS} -DNDEBUG
 endif
 
 include .depend