diff --git a/src/window.rs b/src/window.rs
index ea1efac..a863fdb 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -246,10 +246,12 @@ pub mod imp {
         }
 
         fn on_article_selected(&self, obj: ArticleObject) {
-            // Mark previous article as read (unless guard is set)
+            // Mark the previous article as read — both on the server and in the
+            // sidebar — now that the user has navigated away from it.
             if !*self.mark_unread_guard.borrow() {
                 if let Some(prev_id) = self.current_article_id.borrow().clone() {
                     if prev_id != obj.article().id {
+                        self.mark_read_in_list(&prev_id);
                         self.bg_mark_read(prev_id);
                     }
                 }
@@ -267,7 +269,20 @@ pub mod imp {
             if !same_article {
                 self.load_article_in_webview(&article);
             }
-            obj.set_unread(false);
+        }
+
+        /// Mark an article as read in the sidebar list (UI only).
+        fn mark_read_in_list(&self, article_id: &str) {
+            if let Some(store) = self.article_store.borrow().as_ref() {
+                for i in 0..store.n_items() {
+                    if let Some(obj) = store.item(i).and_downcast::<ArticleObject>() {
+                        if obj.article().id == article_id {
+                            obj.set_unread(false);
+                            break;
+                        }
+                    }
+                }
+            }
         }
 
         fn reload_current_article(&self) {