diff --git a/USRP2DMR/USRP2DMR.cpp b/USRP2DMR/USRP2DMR.cpp
index 6c40b30..6d0acd9 100644
--- a/USRP2DMR/USRP2DMR.cpp
+++ b/USRP2DMR/USRP2DMR.cpp
@@ -302,7 +302,8 @@ int CUSRP2DMR::run()
 					m_usrpFrames++;
 				}
 				else if( (m_usrpFrame[20] == USRP_TYPE_VOICE) && (m_usrpFrame[15] == USRP_KEYUP_TRUE) ){
-					if(!m_usrpFrames){	
+					if(!m_usrpFrames){
+						m_dmrSrc = m_defsrcid;
 						m_conv.putUSRPHeader();
 						LogMessage("USRP voice received as first frame");
 					}