diff --git a/yaml/xyz/openbmc_project/Inventory/Item/PCIeDevice.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item/PCIeDevice.interface.yaml
index ab2b49a..a710268 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item/PCIeDevice.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item/PCIeDevice.interface.yaml
@@ -10,12 +10,12 @@
           Indicates if the device is MultiFunction or SingleFunction.
     - name: GenerationInUse
       type: enum[xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations]
-      default: 'Unknown'
+      default: "Unknown"
       description: >
           The PCIe interface generation in use by the device.
     - name: GenerationSupported
       type: enum[xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations]
-      default: 'Unknown'
+      default: "Unknown"
       description: >
           The maximum PCIe generation supported by the device.