diff --git a/src/modules/comment/comment.model.ts b/src/modules/comment/comment.model.ts
index a79e87bf..04d1ffb1 100644
--- a/src/modules/comment/comment.model.ts
+++ b/src/modules/comment/comment.model.ts
@@ -101,7 +101,7 @@ export class CommentModel extends BaseModel {
   @prop({ select: false })
   agent?: string
 
-  @prop()
+  @prop({ default: false })
   pin?: boolean
 
   @prop({