diff --git a/USRP2M17/USRP2M17.cpp b/USRP2M17/USRP2M17.cpp
index cde8169..b8fa26a 100644
--- a/USRP2M17/USRP2M17.cpp
+++ b/USRP2M17/USRP2M17.cpp
@@ -463,7 +463,7 @@ int CUSRP2M17::run()
 					}
 					m_usrpFrames++;
 				}
-				else if(m_usrpFrame[20] == USRP_TYPE_VOICE) && (m_usrpFrame[15] == USRP_KEYUP_TRUE){
+				else if( (m_usrpFrame[20] == USRP_TYPE_VOICE) && (m_usrpFrame[15] == USRP_KEYUP_TRUE) ){
 					if(!m_usrpFrames){	
 						m_conv.putUSRPHeader();
 						LogMessage("USRP voice received as first frame");