Index: /trunk/src/VBox/Main/src-client/GuestSessionImplTasks.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/GuestSessionImplTasks.cpp	(revision 71817)
+++ /trunk/src/VBox/Main/src-client/GuestSessionImplTasks.cpp	(revision 71818)
@@ -816,5 +816,5 @@
                 setProgressErrorMsg(VBOX_E_IPRT_ERROR,
                                     Utf8StrFmt(GuestSession::tr("Destination file \"%s\" could not be opened: %Rrc"),
-                                               strDestFinal, rc));
+                                               strDestFinal.c_str(), rc));
                 break;
         }
@@ -1551,5 +1551,5 @@
                     setProgressErrorMsg(VBOX_E_IPRT_ERROR,
                                         Utf8StrFmt(GuestSession::tr("Destination file \"%s\" could not be opened: %Rrc"),
-                                                   strFileDest, rc));
+                                                   strFileDest.c_str(), rc));
                     break;
             }