--- configure.in
+++ configure.in
@@ -197,8 +197,6 @@
 if test "x$enable_debug" = "xyes" ; then
   CFLAGS="$CFLAGS -O0 -g"
   AC_DEFINE([__DEBUG__], [1], [Build with debugging])
-else
-  CFLAGS="$CFLAGS -O6"
 fi
 
 if test "x$enable_manager" = "xyes" ; then