diff --git a/components/Posts.php b/components/Posts.php
index 2746744..9f3bb13 100644
--- a/components/Posts.php
+++ b/components/Posts.php
@@ -195,6 +195,7 @@ protected function prepareVars()
     protected function listPosts()
     {
         $category = $this->category ? $this->category->id : null;
+        $categorySlug = $this->category ? $this->category->slug : null;
 
         /*
          * List all the posts, eager load their categories
@@ -219,8 +220,8 @@ protected function listPosts()
         /*
          * Add a "url" helper attribute for linking to each post and category
          */
-        $posts->each(function($post) {
-            $post->setUrl($this->postPage, $this->controller);
+        $posts->each(function($post) use ($categorySlug) {
+            $post->setUrl($this->postPage, $this->controller, ['category' => $categorySlug]);
 
             $post->categories->each(function($category) {
                 $category->setUrl($this->categoryPage, $this->controller);
diff --git a/models/Post.php b/models/Post.php
index aa5ab8b..4b81258 100644
--- a/models/Post.php
+++ b/models/Post.php
@@ -152,17 +152,20 @@ public function beforeSave()
      * Sets the "url" attribute with a URL to this object.
      * @param string $pageName
      * @param Controller $controller
+     * @param array $params Override request URL parameters
      *
      * @return string
      */
-    public function setUrl($pageName, $controller)
+    public function setUrl($pageName, $controller, $params = [])
     {
-        $params = [
+        $params = array_merge([
             'id'   => $this->id,
-            'slug' => $this->slug
-        ];
+            'slug' => $this->slug,
+        ], $params);
 
-        $params['category'] = $this->categories->count() ? $this->categories->first()->slug : null;
+        if (!$params['category']) {
+            $params['category'] = $this->categories->count() ? $this->categories->first()->slug : null;
+        }
 
         // Expose published year, month and day as URL parameters.
         if ($this->published) {