diff --git a/src/jack.cxx b/src/jack.cxx
index 081ccba..ccb71df 100644
--- a/src/jack.cxx
+++ b/src/jack.cxx
@@ -245,13 +245,13 @@ Jack::Jack( std::string name ) :
 		timeManager->registerObserver( loopers.back() );
 		if(gui->enablePerTrackOutput) {
 			char name[50];
-			sprintf(name,"track_%d_l",i);
+			sprintf(name,"track_%d_l",i + 1);
 			trackJackOutputPorts[o]=jack_port_register( client,
 			                        name,
 			                        JACK_DEFAULT_AUDIO_TYPE,
 			                        JackPortIsOutput,
 			                        0 );
-			sprintf(name,"track_%d_r",i);
+			sprintf(name,"track_%d_r",i + 1);
 			trackJackOutputPorts[o+1]=jack_port_register( client,
 			                          name,
 			                          JACK_DEFAULT_AUDIO_TYPE,
diff --git a/src/jacksendreturn.cxx b/src/jacksendreturn.cxx
index e04221a..6b87e99 100644
--- a/src/jacksendreturn.cxx
+++ b/src/jacksendreturn.cxx
@@ -7,13 +7,14 @@ JackSendReturn::JackSendReturn(int trackid, AudioProcessor *prev, jack_client_t
 	:m_trackid(trackid), m_previousProcessor(prev), m_sendvol(1.0f)
 {
 	char name[50];
-	sprintf(name, "Send_track_%d_l\n",trackid);
+	int trackid_human = trackid + 1;
+	sprintf(name, "Send_track_%d_l\n",trackid_human);
 	m_sendport_l=jack_port_register(client,name,JACK_DEFAULT_AUDIO_TYPE,JackPortIsOutput,0);
-	sprintf(name, "Send_track_%d_r\n",trackid);
+	sprintf(name, "Send_track_%d_r\n",trackid_human);
 	m_sendport_r=jack_port_register(client,name,JACK_DEFAULT_AUDIO_TYPE,JackPortIsOutput,0);
-	sprintf(name, "Return_track_%d_l\n",trackid);
+	sprintf(name, "Return_track_%d_l\n",trackid_human);
 	m_returnport_l=jack_port_register(client,name,JACK_DEFAULT_AUDIO_TYPE,JackPortIsInput,0);
-	sprintf(name, "Return_track_%d_r\n",trackid);
+	sprintf(name, "Return_track_%d_r\n",trackid_human);
 	m_returnport_r=jack_port_register(client,name,JACK_DEFAULT_AUDIO_TYPE,JackPortIsInput,0);
 	m_active=false;
 	m_counter=0;