diff --git a/compat/configure.ac b/compat/configure.ac
index 6822f39..34e4a81 100644
--- a/compat/configure.ac
+++ b/compat/configure.ac
@@ -36,9 +36,9 @@ AC_CHECK_HEADERS(keyutils.h, , [AC_MSG_ERROR([keyutils.h header not found. You n
 #debug support - yes for a while
 PKG_ARG_ENABLE(debug, "yes", DEBUG, [Enable Debug support])
 if test $pkg_cv_enable_debug = yes; then
-	CFLAGS="$CFLAGS -g -O1 -Wall -Wstrict-prototypes -pipe"
+	CFLAGS="$CFLAGS -g -O2 -Wall -Wstrict-prototypes -pipe"
 else
-	CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -pipe -fomit-frame-pointer"
+	CFLAGS="$CFLAGS -O2 -Wall -Wstrict-prototypes -pipe -fomit-frame-pointer"
 fi
 
 # for gcov