diff --git a/src/MultiPlayer/multiplaymgr.cxx b/src/MultiPlayer/multiplaymgr.cxx
index 760a56c..534d411 100644
--- a/src/MultiPlayer/multiplaymgr.cxx
+++ b/src/MultiPlayer/multiplaymgr.cxx
@@ -1446,7 +1446,7 @@ FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
         PosMsg->jwhtext[1] = XDR_encode_float (pitch);
         PosMsg->jwhtext[2] = XDR_encode_float (roll);
 
-        SGPropertyNode* n = fgGetNode("/sim/instrumentation/gps/indicated-ground-speed-kt",false);
+        SGPropertyNode* n = fgGetNode("/sim/instrumentation/gps/indicated-ground-speed-kt",true);
         float speed =  n->getDoubleValue();
         PosMsg->jwhtext[3] = XDR_encode_float (speed);