Index: /trunk/src/VBox/Runtime/r3/posix/serialport-posix.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/posix/serialport-posix.cpp	(revision 87872)
+++ /trunk/src/VBox/Runtime/r3/posix/serialport-posix.cpp	(revision 87873)
@@ -300,5 +300,5 @@
     {
         tcflag_t const fCFlagMask = (CS5 | CS6 | CS7 | CS8 | CSTOPB | PARENB | PARODD | CMSPAR);
-        tcflag_t fCFlagNew = 0;
+        tcflag_t fCFlagNew = CLOCAL;
 
         switch (pCfg->enmDataBitCount)