diff -Nur kphoneSI.orig/configure.in kphoneSI/configure.in
--- kphoneSI.orig/configure.in	2006-10-02 16:22:47.000000000 +0200
+++ kphoneSI/configure.in	2006-10-02 16:23:01.000000000 +0200
@@ -194,7 +194,7 @@
          CFLAGS="$CFLAGS -g -DDEBUG"
 AC_MSG_RESULT(yes)
 else
-CFLAGS="$CFLAGS -O3"
+CFLAGS="-O2 $CFLAGS"
 AC_MSG_RESULT(no)
 fi