--- /dev/null
+--- busybox.orig/util-linux/mount.c
++++ busybox/util-linux/mount.c
+@@ -26,6 +26,9 @@
+ /* For FEATURE_MOUNT_LABEL only */
+ #include "volume_id.h"
+ #endif
++#ifndef MS_RELATIME
++#define MS_RELATIME (1 << 21)
++#endif
+
+ /* Needed for nfs support only */
+ #include <sys/utsname.h>
+@@ -136,6 +139,8 @@
+ /* "noatime" */ MS_NOATIME,
+ /* "diratime" */ ~MS_NODIRATIME,
+ /* "nodiratime" */ MS_NODIRATIME,
++ /* "relatime" */ MS_RELATIME,
++ /* "norelatime" */ ~MS_RELATIME,
+ /* "loud" */ ~MS_SILENT,
+
+ // action flags
+@@ -186,6 +191,8 @@
+ "noatime" "\0"
+ "diratime" "\0"
+ "nodiratime" "\0"
++ "relatime" "\0"
++ "norelatime" "\0"
+ "loud" "\0"
+
+ // action flags