diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 518b3d3..4e7768b 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -647,8 +647,7 @@ void FGCom::valueChanged(SGPropertyNode *prop)
           _mpTransmitFrequencyNode->setValue(_currentCallFrequency * 1000000);
           _mpTransmitPowerNode->setValue(1.0);
 
-          SGPath soundpath( globals->get_fg_root() );
-          soundpath.append( "/Sounds/click.wav" );
+          SGPath soundpath( globals->get_fg_root() + "/Sounds/click.wav" );
 
           SG_LOG(SG_SOUND, SG_ALERT, "FGCom: PTT active: " << soundpath);