diff --git a/Userland/Libraries/LibGUI/ModelSelection.cpp b/Userland/Libraries/LibGUI/ModelSelection.cpp
index 1aa22a3d64..825384c280 100644
--- a/Userland/Libraries/LibGUI/ModelSelection.cpp
+++ b/Userland/Libraries/LibGUI/ModelSelection.cpp
@@ -29,10 +29,8 @@ void ModelSelection::set(const ModelIndex& index)
 void ModelSelection::add(const ModelIndex& index)
 {
     VERIFY(index.is_valid());
-    if (m_indices.contains(index))
-        return;
-    m_indices.set(index);
-    notify_selection_changed();
+    if (m_indices.set(index) == AK::HashSetResult::InsertedNewEntry)
+        notify_selection_changed();
 }
 
 void ModelSelection::add_all(const Vector<ModelIndex>& indices)