diff --git a/src/soc/intel/common/block/include/intelblocks/msr.h b/src/soc/intel/common/block/include/intelblocks/msr.h
index 82874f9224..4aa069e068 100644
--- a/src/soc/intel/common/block/include/intelblocks/msr.h
+++ b/src/soc/intel/common/block/include/intelblocks/msr.h
@@ -106,8 +106,9 @@
 #define MSR_L2_QOS_MASK(reg)		(0xd10 + reg)
 
 /* MTRR_CAP_MSR bits */
-#define SMRR_SUPPORTED	(1<<11)
-#define PRMRR_SUPPORTED	(1<<12)
+#define SMRR_SUPPORTED			(1<<11)
+#define PRMRR_SUPPORTED			(1<<12)
+#define SMRR_LOCK_SUPPORTED		(1<<14)
 
 #define SGX_SUPPORTED	(1<<2)
 /* Intel SDM: Table 36-6.