diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 38c6461fd3..c970e41699 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -61,6 +61,7 @@
 #define NVME_TEMPERATURE 0x143
 #define NVME_TEMPERATURE_WARNING 0x157
 #define NVME_TEMPERATURE_CRITICAL 0x175
+#define NVME_NUM_FW_SLOTS 1
 
 #define NVME_GUEST_ERR(trace, fmt, ...) \
     do { \
@@ -1664,7 +1665,7 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice *pci_dev)
      * inconsequential.
      */
     id->acl = 3;
-    id->frmw = 7 << 1;
+    id->frmw = (NVME_NUM_FW_SLOTS << 1) | NVME_FRMW_SLOT1_RO;
     id->lpa = 1 << 0;
 
     /* recommended default value (~70 C) */
diff --git a/include/block/nvme.h b/include/block/nvme.h
index 273640c2b1..f3fdb5bf11 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -843,6 +843,10 @@ enum NvmeIdCtrlOncs {
     NVME_ONCS_TIMESTAMP     = 1 << 6,
 };
 
+enum NvmeIdCtrlFrmw {
+    NVME_FRMW_SLOT1_RO = 1 << 0,
+};
+
 #define NVME_CTRL_SQES_MIN(sqes) ((sqes) & 0xf)
 #define NVME_CTRL_SQES_MAX(sqes) (((sqes) >> 4) & 0xf)
 #define NVME_CTRL_CQES_MIN(cqes) ((cqes) & 0xf)