--- a/src/DIF/RMT/RMTQueue.h
+++ b/src/DIF/RMT/RMTQueue.h
@@ -173,6 +173,7 @@
     void redrawGUI();
 
     simsignal_t sigRMTPDURcvd;
+    simsignal_t sigRMTPDUPreSend;
     simsignal_t sigRMTPDUSent;
     simsignal_t sigStatRMTQueueLength;
 };