diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
index 4e06ef972f13..63d5c1ac19c4 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json
@@ -2857,8 +2857,7 @@
         },
         "temporaryDisk": {
           "$ref": "#/definitions/TemporaryDisk",
-          "description": "Temporary disk settings",
-          "default": "/tmp"
+          "description": "Temporary disk settings"
         },
         "persistentDisk": {
           "$ref": "#/definitions/PersistentDisk",
@@ -2879,7 +2878,8 @@
         },
         "mountPath": {
           "description": "Mount path of the temporary disk",
-          "type": "string"
+          "type": "string",
+          "default": "/tmp"
         }
       }
     },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2020-11-01-preview/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2020-11-01-preview/appplatform.json
index b0d19d3eff1d..aa9615cff9b6 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2020-11-01-preview/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2020-11-01-preview/appplatform.json
@@ -3443,8 +3443,7 @@
         },
         "temporaryDisk": {
           "$ref": "#/definitions/TemporaryDisk",
-          "description": "Temporary disk settings",
-          "default": "/tmp"
+          "description": "Temporary disk settings"
         },
         "persistentDisk": {
           "$ref": "#/definitions/PersistentDisk",
@@ -3470,7 +3469,8 @@
         },
         "mountPath": {
           "description": "Mount path of the temporary disk",
-          "type": "string"
+          "type": "string",
+          "default": "/tmp"
         }
       }
     },
diff --git a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
index 2913d38a26a6..d0d132d16f10 100644
--- a/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
+++ b/specification/appplatform/resource-manager/Microsoft.AppPlatform/stable/2020-07-01/appplatform.json
@@ -3419,8 +3419,7 @@
         },
         "temporaryDisk": {
           "$ref": "#/definitions/TemporaryDisk",
-          "description": "Temporary disk settings",
-          "default": "/tmp"
+          "description": "Temporary disk settings"
         },
         "persistentDisk": {
           "$ref": "#/definitions/PersistentDisk",
@@ -3441,7 +3440,8 @@
         },
         "mountPath": {
           "description": "Mount path of the temporary disk",
-          "type": "string"
+          "type": "string",
+          "default": "/tmp"
         }
       }
     },