diff --git a/sys/dev/nvme/nvme.h b/sys/dev/nvme/nvme.h
--- a/sys/dev/nvme/nvme.h
+++ b/sys/dev/nvme/nvme.h
@@ -553,8 +553,9 @@
 	NVME_CRIT_WARN_ST_DEVICE_RELIABILITY		= 0x4,
 	NVME_CRIT_WARN_ST_READ_ONLY			= 0x8,
 	NVME_CRIT_WARN_ST_VOLATILE_MEMORY_BACKUP	= 0x10,
+	NVME_CRIT_WARN_ST_PERSISTENT_MEMORY_REGION	= 0x20,
 };
-#define NVME_CRIT_WARN_ST_RESERVED_MASK			(0xE0)
+#define NVME_CRIT_WARN_ST_RESERVED_MASK			(0xC0)
 #define	NVME_ASYNC_EVENT_NS_ATTRIBUTE			(0x100)
 #define	NVME_ASYNC_EVENT_FW_ACTIVATE			(0x200)
 
diff --git a/sys/dev/nvme/nvme_ctrlr.c b/sys/dev/nvme/nvme_ctrlr.c
--- a/sys/dev/nvme/nvme_ctrlr.c
+++ b/sys/dev/nvme/nvme_ctrlr.c
@@ -663,6 +663,9 @@
 	if (state & NVME_CRIT_WARN_ST_VOLATILE_MEMORY_BACKUP)
 		nvme_printf(ctrlr, "SMART WARNING: volatile memory backup device failed\n");
 
+	if (state & NVME_CRIT_WARN_ST_PERSISTENT_MEMORY_REGION)
+		nvme_printf(ctrlr, "SMART WARNING: persistent memory read only or unreliable\n");
+
 	if (state & NVME_CRIT_WARN_ST_RESERVED_MASK)
 		nvme_printf(ctrlr, "SMART WARNING: unknown critical warning(s): state = 0x%02x\n",
 		    state & NVME_CRIT_WARN_ST_RESERVED_MASK);