diff --git a/pub/include/infra/pub_flags.h b/pub/include/infra/pub_flags.h
index 107cc5f..5ec8b26 100755
--- a/pub/include/infra/pub_flags.h
+++ b/pub/include/infra/pub_flags.h
@@ -54,6 +54,7 @@
 
 #define NVRO_INIT        (0)       /* initial state */
 #define NVRO_BACKED_UP   (0xBACE)  /* nvro backed up already */
+#define NVRO_BACKING_UP  (0xBAC1)  /* nvro back up next boot */
 #define NVRO_RESTORING   (0x2E20)  /* nvro restoring  */
 #define NVRO_INVALID     (0xDEAD)  /* nvro invalid */