Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 50509)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 50510)
@@ -720,5 +720,5 @@
     /** If extra data GUI/HidLedsSync is not present in VM config or set to 1 then sync is enabled. Otherwise, it is disabled. */
     QString strHidLedsSyncSettings = session().GetMachine().GetExtraData(GUI_HidLedsSync);
-    if (strHidLedsSyncSettings == NULL || strHidLedsSyncSettings == "1")
+    if (strHidLedsSyncSettings.isEmpty() || strHidLedsSyncSettings == "1")
         return true;