diff --git a/include/block/nvme.h b/include/block/nvme.h
index 45b2678db1..41614c5e12 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -789,6 +789,7 @@ enum NvmeSmartWarn {
     NVME_SMART_RELIABILITY            = 1 << 2,
     NVME_SMART_MEDIA_READ_ONLY        = 1 << 3,
     NVME_SMART_FAILED_VOLATILE_MEDIA  = 1 << 4,
+    NVME_SMART_PMR_UNRELIABLE         = 1 << 5,
 };
 
 typedef struct NvmeEffectsLog {