diff --git a/lib/core/form/models/task-process-variable.model.ts b/lib/core/form/models/task-process-variable.model.ts
index f0e617bd09..760951539d 100644
--- a/lib/core/form/models/task-process-variable.model.ts
+++ b/lib/core/form/models/task-process-variable.model.ts
@@ -16,7 +16,7 @@
  */
 
 export class TaskProcessVariableModel {
-    id: string;
-    type: string;
+    id?: string;
+    type?: string;
     value: string;
 }
diff --git a/lib/process-services-cloud/src/lib/form/models/task-variable-cloud.model.ts b/lib/process-services-cloud/src/lib/form/models/task-variable-cloud.model.ts
index bf794026d9..48716d1bfb 100644
--- a/lib/process-services-cloud/src/lib/form/models/task-variable-cloud.model.ts
+++ b/lib/process-services-cloud/src/lib/form/models/task-variable-cloud.model.ts
@@ -18,8 +18,8 @@
 export class TaskVariableCloud {
     name: string;
     value: any;
-    type: string;
-    id: string;
+    type?: string;
+    id?: string;
     constructor(obj) {
         this.id = obj.name || null;
         this.name = obj.name || null;