diff --git a/configure.in b/configure.in
index 36d1fc1..6845c48 100644
--- a/configure.in
+++ b/configure.in
@@ -333,12 +333,12 @@ AC_ARG_ENABLE(debug, AC_HELP_STRING(--enable-debug,create a file for debugging m
       ac_ec_debug=yes
       ;;
    no)  AC_MSG_RESULT(no)
-      DEBUG_FLAGS="-O2 -funroll-loops -fomit-frame-pointer -Wall"
+      DEBUG_FLAGS="-fomit-frame-pointer -Wall"
       ac_ec_debug=no
       ;;
 esac ],
    AC_MSG_RESULT(no)
-   DEBUG_FLAGS="-O2 -funroll-loops -fomit-frame-pointer -Wall"
+   DEBUG_FLAGS="-fomit-frame-pointer -Wall"
    ac_ec_debug=no
 )