diff --git a/playground/parrots/Overlay.cpp b/playground/parrots/Overlay.cpp
index 63a98178..f17827f5 100644
--- a/playground/parrots/Overlay.cpp
+++ b/playground/parrots/Overlay.cpp
@@ -19,7 +19,7 @@
 
 namespace
 {
-    class Material : public TextureFilterMaterial
+    class Material final : public TextureFilterMaterial
     {
       public:
         using TextureFilterMaterial::TextureFilterMaterial;
@@ -31,7 +31,7 @@ namespace
         }
     };
 
-    class FilterNode : public TextureFilterNode
+    class FilterNode final : public TextureFilterNode
     {
       public:
         FilterNode( bool useRhi, QSGTexture* texture )
@@ -52,7 +52,7 @@ namespace
         }
     };
 
-    class Skinlet : public QskSkinlet
+    class Skinlet final : public QskSkinlet
     {
         using Inherited = QskSkinlet;
 
@@ -70,8 +70,8 @@ namespace
             return contentsRect;
         }
 
-        QSGNode* updateSubNode(
-            const QskSkinnable* skinnable, quint8 nodeRole, QSGNode* node ) const
+        QSGNode* updateSubNode( const QskSkinnable* skinnable,
+            quint8 nodeRole, QSGNode* node ) const override
         {
             const auto overlay = static_cast< const Overlay* >( skinnable );
 
diff --git a/playground/parrots/main.cpp b/playground/parrots/main.cpp
index 00130446..7d61af84 100644
--- a/playground/parrots/main.cpp
+++ b/playground/parrots/main.cpp
@@ -146,7 +146,7 @@ class MainView : public QskControl
     }
 
   protected:
-    void updateLayout()
+    void updateLayout() override
     {
         if ( m_background )
             m_background->setGeometry( rect() );