Index: /trunk/include/VBox/hgcmsvc.h
===================================================================
--- /trunk/include/VBox/hgcmsvc.h	(revision 29868)
+++ /trunk/include/VBox/hgcmsvc.h	(revision 29869)
@@ -246,5 +246,5 @@
         type = VBOX_HGCM_SVC_PARM_PTR;
         u.pointer.addr = (void *)psz;
-        u.pointer.size = strlen(psz) + 1;
+        u.pointer.size = (uint32_t)strlen(psz) + 1;
     }