diff --git a/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
index 18168de..b68b6c0 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item/CpuCore.interface.yaml
@@ -2,7 +2,8 @@
     Implement to provide CPU core attributes.
 properties:
     - name: Microcode
-      type: string
+      type: uint32
       description: >
-          The microcode information for this core.
-          Should be left empty if this is not supported.
+          The microcode information for this processor
+      default: 0
+