Index: /trunk/src/VBox/Frontends/VirtualBox/src/widgets/graphics/UIGraphicsScrollBar.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/widgets/graphics/UIGraphicsScrollBar.cpp	(revision 77018)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/widgets/graphics/UIGraphicsScrollBar.cpp	(revision 77019)
@@ -29,4 +29,7 @@
 #include "UIIconPool.h"
 
+/* External includes: */
+#include <math.h>
+
 
 /** QIGraphicsWidget subclass providing GUI with graphics scroll-bar taken. */