diff --git a/specification/json/sections/cper-memory.json b/specification/json/sections/cper-memory.json
index bdb01da..e2bd787 100644
--- a/specification/json/sections/cper-memory.json
+++ b/specification/json/sections/cper-memory.json
@@ -8,6 +8,7 @@
         "memoryErrorType",
         "extended",
         "physicalAddress",
+        "physicalAddressHex",
         "physicalAddressMask",
         "node",
         "card",
@@ -179,6 +180,9 @@
             "type": "integer",
             "description": "The physical address at which the memory error occurred."
         },
+        "physicalAddressHex": {
+            "type": "string"
+        },
         "physicalAddressMask": {
             "type": "integer",
             "description": "Defines the valid address bits in the Physical Address field. The mask specifies the granularity of the physical address."