Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIActionPoolRuntime.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIActionPoolRuntime.cpp	(revision 71106)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIActionPoolRuntime.cpp	(revision 71107)
@@ -35,4 +35,7 @@
 # include "CExtPack.h"
 # include "CExtPackManager.h"
+
+/* External includes: */
+# include <math.h>
 
 #endif /* !VBOX_WITH_PRECOMPILED_HEADERS */