modules/graphics/src/main/java/com/sun/glass/ui/monocle/headless/HeadlessScreen.java

@@ -34,11 +34,11 @@
 import java.nio.ByteOrder;
 import java.nio.IntBuffer;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 
-public class HeadlessScreen implements NativeScreen {
+public class HeadlessScreen extends NativeScreen {
 
     protected int depth;
     protected int width;
     protected int height;
     protected Framebuffer fb;