diff --git a/specification/json/cper-json.json b/specification/json/cper-json.json
index e0e7133..302adc9 100644
--- a/specification/json/cper-json.json
+++ b/specification/json/cper-json.json
@@ -35,7 +35,8 @@
                     { "$ref": "./sections/cper-iommu-dmar.json" },
                     { "$ref": "./sections/cper-ccix-per.json" },
                     { "$ref": "./sections/cper-cxl-protocol.json" },
-                    { "$ref": "./sections/cper-cxl-component.json" }
+                    { "$ref": "./sections/cper-cxl-component.json" },
+                    { "$ref": "./sections/cper-unknown.json" }
                 ]
             }
         }