diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 3ad593c..bcd6f1c 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -643,7 +643,7 @@ void FGCom::valueChanged(SGPropertyNode *prop)
 
     SGPropertyNode_ptr args(new SGPropertyNode);
     args->setStringValue("label", "PTT按下，请讲...");
-    args->setIntValue("delay", (delay) ? delay : 15);
+    args->setIntValue("delay", 5);
     globals->get_commands()->execute("show-message", args);
 
           setupCommFrequency();