diff --git a/extensions/openpower-pels/registry/README.md b/extensions/openpower-pels/registry/README.md
index 3e55b43..6a4be33 100644
--- a/extensions/openpower-pels/registry/README.md
+++ b/extensions/openpower-pels/registry/README.md
@@ -365,6 +365,47 @@
 used as in the previous example, so these callouts can also depend on the
 system type.
 
+If it's desired to use a different set of callouts when there isn't a match
+on the AdditionalData field, one can use CalloutsWhenNoADMatch.  In the
+following example, the 'air_mover' callout will be added if 'PROC_NUM' isn't
+0.  'CalloutsWhenNoADMatch' has the same schema as the 'Callouts' section.
+
+```
+"CalloutsUsingAD":
+{
+    "ADName": "PROC_NUM",
+    "CalloutsWithTheirADValues":
+    [
+        {
+            "ADValue": "0",
+            "Callouts":
+            [
+                {
+                    "CalloutList":
+                    [
+                        {
+                            "Priority": "high",
+                            "LocCode": "P1-C5"
+                        }
+                    ]
+                }
+            ]
+        },
+    ],
+    "CalloutsWhenNoADMatch": [
+        {
+            "CalloutList": [
+                {
+                    "Priority": "high",
+                    "SymbolicFRU": "air_mover"
+                }
+            ]
+        }
+    ]
+}
+
+```
+
 #### CalloutType
 This field can be used to modify the failing component type field in the
 callout when the default doesn\'t fit:
diff --git a/extensions/openpower-pels/registry/schema/schema.json b/extensions/openpower-pels/registry/schema/schema.json
index 1c405bf..a866ed3 100644
--- a/extensions/openpower-pels/registry/schema/schema.json
+++ b/extensions/openpower-pels/registry/schema/schema.json
@@ -658,14 +658,16 @@
 
         "calloutsUsingAD":
         {
-            "description": "This contains the callouts that can be specified based on a value in the AdditionalData property..",
+            "description": "This contains the callouts that can be specified based on a value in the AdditionalData property.",
             "type": "object",
 
             "properties":
             {
                 "ADName": {"$ref": "#/definitions/adName" },
                 "CalloutsWithTheirADValues":
-                    {"$ref": "#/definitions/calloutsWithTheirADValues" }
+                    {"$ref": "#/definitions/calloutsWithTheirADValues" },
+                "CalloutsWhenNoADMatch":
+                    {"$ref": "#/definitions/calloutsWhenNoADMatch" }
             },
             "additionalProperties": false,
             "required": ["ADName", "CalloutsWithTheirADValues"],
@@ -697,6 +699,12 @@
                     ]
                 }
             ]
+        },
+
+        "calloutsWhenNoADMatch":
+        {
+            "description": "This contains the callouts to use when a match in the 'CalloutsWithTheirADValues array isn't found.",
+            "$ref": "#/definitions/callouts"
         }
     }
 }