diff --git a/src/app/three-ways/posts-3.component.ts b/src/app/three-ways/posts-3.component.ts
index 1fe69c5..05bbd93 100644
--- a/src/app/three-ways/posts-3.component.ts
+++ b/src/app/three-ways/posts-3.component.ts
@@ -38,7 +38,7 @@ export class Posts3Component implements OnInit {
         this._data
             .takeWhile(() => !this.groupPosts) // unsubscribe once groupPosts has value
             .subscribe(x => {
-                this.groupPosts = this.groupByCategory(this.data);
+                this.groupPosts = this.groupByCategory(x);
             });
     }
 
@@ -52,4 +52,4 @@ export class Posts3Component implements OnInit {
 
         return result;
     }
-}
\ No newline at end of file
+}