diff --git a/src/commonlib/include/commonlib/coreboot_tables.h b/src/commonlib/include/commonlib/coreboot_tables.h
index fa966b5fef..251e2c4491 100644
--- a/src/commonlib/include/commonlib/coreboot_tables.h
+++ b/src/commonlib/include/commonlib/coreboot_tables.h
@@ -143,6 +143,7 @@ struct lb_memory_range {
 #define LB_MEM_NVS		 4	/* ACPI NVS Memory */
 #define LB_MEM_UNUSABLE		 5	/* Unusable address space */
 #define LB_MEM_VENDOR_RSVD	 6	/* Vendor Reserved */
+#define LB_MEM_TAG		 7	/* Armv9 tag storage for MTE */
 #define LB_MEM_TABLE		16    /* Ram configuration tables are kept in */
 #define LB_MEM_SOFT_RESERVED	0xefffffff /* Specific purpose memory */
 };
diff --git a/src/include/bootmem.h b/src/include/bootmem.h
index b1352e395b..6bd2aab9eb 100644
--- a/src/include/bootmem.h
+++ b/src/include/bootmem.h
@@ -29,6 +29,7 @@ enum bootmem_type {
 	BM_MEM_VENDOR_RSVD,	/* Vendor Reserved */
 	BM_MEM_OPENSBI,		/* Risc-V OpenSBI */
 	BM_MEM_BL31,		/* Arm64 BL31 executable */
+	BM_MEM_TAG,		/* Armv9-A tag storage for MTE */
 	BM_MEM_TABLE,		/* Ram configuration tables are kept in */
 	/* Tags below this point are ignored for the OS table. */
 	BM_MEM_OS_CUTOFF = BM_MEM_TABLE,
diff --git a/src/lib/bootmem.c b/src/lib/bootmem.c
index f8963f3299..dbd8450f06 100644
--- a/src/lib/bootmem.c
+++ b/src/lib/bootmem.c
@@ -55,6 +55,8 @@ static uint32_t bootmem_to_lb_tag(const enum bootmem_type tag)
 		return LB_MEM_TABLE;
 	case BM_MEM_SOFT_RESERVED:
 		return LB_MEM_SOFT_RESERVED;
+	case BM_MEM_TAG:
+		return LB_MEM_TAG;
 	default:
 		printk(BIOS_ERR, "Unsupported tag %u\n", tag);
 		return LB_MEM_RESERVED;
@@ -166,6 +168,7 @@ static const struct range_strings type_strings[] = {
 	{ BM_MEM_SOFT_RESERVED, "SOFT RESERVED" },
 	{ BM_MEM_RAMSTAGE, "RAMSTAGE" },
 	{ BM_MEM_PAYLOAD, "PAYLOAD" },
+	{ BM_MEM_TAG, "TAG STORAGE" },
 };
 
 static const char *bootmem_range_string(const enum bootmem_type tag)