diff --git a/core/AmEvent.h b/core/AmEvent.h
index ee4968c5..11756e7b 100644
--- a/core/AmEvent.h
+++ b/core/AmEvent.h
@@ -33,6 +33,7 @@
 #include <string>
 using std::string;
 
+#define E_TERMINATE_LEG    0
 #define E_PLUGIN           100
 #define E_SYSTEM           101
 #define E_SIP_SUBSCRIPTION 102
diff --git a/core/AmRtpStream.h b/core/AmRtpStream.h
index 96902b22..d46b5b82 100644
--- a/core/AmRtpStream.h
+++ b/core/AmRtpStream.h
@@ -97,7 +97,7 @@ class AmRtpTimeoutEvent
 	
 public:
   AmRtpTimeoutEvent() 
-    : AmEvent(0) { }
+    : AmEvent(E_TERMINATE_LEG) { }
   ~AmRtpTimeoutEvent() { }
 };
 
diff --git a/core/AmSession.cpp b/core/AmSession.cpp
index 1b7fd1e1..ec57e57f 100644
--- a/core/AmSession.cpp
+++ b/core/AmSession.cpp
@@ -539,7 +539,7 @@ void AmSession::setStopped(bool wakeup) {
     onStop();
   }
   if (wakeup)
-    AmSessionContainer::instance()->postEvent(getLocalTag(), new AmEvent(0));
+    AmSessionContainer::instance()->postEvent(getLocalTag(), new AmEvent(E_TERMINATE_LEG));
 }
 
 string AmSession::getAppParam(const string& param_name) const
diff --git a/core/ampi/DiameterClientAPI.h b/core/ampi/DiameterClientAPI.h
index ed55402b..907d161d 100644
--- a/core/ampi/DiameterClientAPI.h
+++ b/core/ampi/DiameterClientAPI.h
@@ -51,7 +51,7 @@ struct DiameterReplyEvent
 
  DiameterReplyEvent(unsigned int commandCode, 
 		    unsigned int applicationId, AmArg avps)
-   : AmEvent(0), commandCode(commandCode), 
+   : AmEvent(E_TERMINATE_LEG), commandCode(commandCode),
     applicationId(applicationId), avps(avps)
   { }
 };