diff --git a/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts b/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
index 0a9c544..a126aa1 100644
--- a/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
+++ b/src/app/workflow-spec-list/workflow-spec-list.component.spec.ts
@@ -223,7 +223,7 @@ describe('WorkflowSpecListComponent', () => {
     const _addWorkflowSpecCategorySpy = spyOn((component as any), '_addWorkflowSpecCategory').and.stub();
     const _updateWorkflowSpecCategorySpy = spyOn((component as any), '_updateWorkflowSpecCategory').and.stub();
 
-    component.selectedSpec = undefined;
+    component.selectedCat = undefined;
     (component as any)._upsertWorkflowSpecCategory(mockWorkflowSpecCategory1 as WorkflowSpecCategoryDialogData);
     expect(_addWorkflowSpecCategorySpy).toHaveBeenCalled();
     expect(_updateWorkflowSpecCategorySpy).not.toHaveBeenCalled();
diff --git a/src/app/workflow-spec-list/workflow-spec-list.component.ts b/src/app/workflow-spec-list/workflow-spec-list.component.ts
index 68f06bd..e56f9e5 100644
--- a/src/app/workflow-spec-list/workflow-spec-list.component.ts
+++ b/src/app/workflow-spec-list/workflow-spec-list.component.ts
@@ -172,7 +172,7 @@ export class WorkflowSpecListComponent implements OnInit {
   }
 
   private _upsertWorkflowSpecCategory(data: WorkflowSpecCategoryDialogData) {
-    if (data.id && data.name && data.display_name) {
+    if (isNumberDefined(data.id) && data.name && data.display_name) {
 
       // Save old workflow spec id, in case it's changed
       const catId = this.selectedCat ? this.selectedCat.id : undefined;
@@ -183,7 +183,7 @@ export class WorkflowSpecListComponent implements OnInit {
         display_name: data.display_name,
       };
 
-      if (catId) {
+      if (isNumberDefined(catId)) {
         this._updateWorkflowSpecCategory(catId, newCat);
       } else {
         this._addWorkflowSpecCategory(newCat);