Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.cpp	(revision 55813)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.cpp	(revision 55814)
@@ -1507,4 +1507,6 @@
                                          double dBackingScaleFactor)
 {
+    NOREF(enmScalingOptimizationType);
+
     /* Calculate offset: */
     size_t offset = (rect.x() + iContentsShiftX) * image.depth() / 8 +