diff --git a/src/app/browser/window/tab/item/page/search/form/navigation.rs b/src/app/browser/window/tab/item/page/search/form/navigation.rs
index 6ae379e0..779c2a0d 100644
--- a/src/app/browser/window/tab/item/page/search/form/navigation.rs
+++ b/src/app/browser/window/tab/item/page/search/form/navigation.rs
@@ -76,7 +76,7 @@ impl Navigation {
                 }
                 None => iter.reset(),
             },
-            None => todo!(),
+            None => todo!(), // unexpected
         }
     }
 
@@ -97,7 +97,7 @@ impl Navigation {
                 }
                 None => iter.reset(),
             },
-            None => todo!(),
+            None => todo!(), // unexpected
         }
     }
 }