diff --git a/src/arch/x86/smbios.c b/src/arch/x86/smbios.c
index a48cf43e12..9b47ff67ae 100644
--- a/src/arch/x86/smbios.c
+++ b/src/arch/x86/smbios.c
@@ -930,7 +930,7 @@ int smbios_write_type9(unsigned long *current, int *handle,
 			const enum slot_data_bus_bandwidth bandwidth,
 			const enum misc_slot_usage usage,
 			const enum misc_slot_length length,
-			u8 slot_char1, u8 slot_char2, u8 bus, u8 dev_func)
+			const u16 id, u8 slot_char1, u8 slot_char2, u8 bus, u8 dev_func)
 {
 	struct smbios_type9 *t = (struct smbios_type9 *)*current;
 	int len = sizeof(struct smbios_type9);
@@ -942,6 +942,7 @@ int smbios_write_type9(unsigned long *current, int *handle,
 	t->slot_designation = smbios_add_string(t->eos, name ? name : "SLOT");
 	t->slot_type = type;
 	/* TODO add slot_id supoort, will be "_SUN" for ACPI devices */
+	t->slot_id = id;
 	t->slot_data_bus_width = bandwidth;
 	t->current_usage = usage;
 	t->slot_length = length;
@@ -1272,6 +1273,7 @@ static int smbios_walk_device_tree_type9(struct device *dev, int *handle,
 				  bandwidth,
 				  usage,
 				  length,
+				  0,
 				  1,
 				  0,
 				  dev->bus->secondary,
diff --git a/src/include/smbios.h b/src/include/smbios.h
index 694e091387..e5e5df5fe3 100644
--- a/src/include/smbios.h
+++ b/src/include/smbios.h
@@ -20,7 +20,7 @@ int smbios_write_type9(unsigned long *current, int *handle,
 			const enum slot_data_bus_bandwidth bandwidth,
 			const enum misc_slot_usage usage,
 			const enum misc_slot_length length,
-			u8 slot_char1, u8 slot_char2, u8 bus, u8 dev_func);
+			const u16 id, u8 slot_char1, u8 slot_char2, u8 bus, u8 dev_func);
 enum smbios_bmc_interface_type;
 int smbios_write_type38(unsigned long *current, int *handle,
 			const enum smbios_bmc_interface_type interface_type,
diff --git a/src/mainboard/ocp/deltalake/ramstage.c b/src/mainboard/ocp/deltalake/ramstage.c
index 211ba0f7b6..50a87e9232 100644
--- a/src/mainboard/ocp/deltalake/ramstage.c
+++ b/src/mainboard/ocp/deltalake/ramstage.c
@@ -83,6 +83,7 @@ typedef struct {
 	const char *slot_designator;
 } slot_info;
 
+/* Array index + 1 would be used as Slot ID */
 slot_info slotinfo[] = {
 	{CSTACK,  SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0xE8, "SSD1_M2_Data_Drive"},
 	{PSTACK1, SlotTypePciExpressGen3X4, SlotDataBusWidth4X, 0x10, "SSD0_M2_Boot_Drive"},
@@ -265,12 +266,14 @@ static int create_smbios_type9(int *handle, unsigned long *current)
 		if (sltcap & PCI_EXP_SLTCAP_HPC)
 			characteristics_2 |= SMBIOS_SLOT_HOTPLUG;
 
+		const uint16_t slot_id = index + 1;
 		length += smbios_write_type9(current, handle,
 					  slotinfo[index].slot_designator,
 					  slotinfo[index].slot_type,
 					  slotinfo[index].slot_data_bus_width,
 					  slot_usage,
 					  slot_length,
+					  slot_id,
 					  characteristics_1,
 					  characteristics_2,
 					  stack_busnos[slotinfo[index].stack],