diff --git a/Config.uk b/Config.uk
index 05d1233..f390731 100644
--- a/Config.uk
+++ b/Config.uk
@@ -4,6 +4,7 @@ menuconfig LIBLWIP
 	select LIBNOLIBC if !HAVE_LIBC
 	select LIBUKDEBUG
 	select LIBUKRANDOM
+	select LIBUKRANDOM_LCPU if (ARCH_X86_64 || ARCH_ARM_64)
 	select LIBUKBITOPS if LIBPOSIX_NETLINK
 	select HAVE_NW_STACK