diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index b315c013b..93f273f18 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -1343,13 +1343,15 @@ void MainWindow::fixStop()
   } else if (m_mode=="FT4") {
   m_hsymStop=21;
   } else if(m_mode=="FST240" or m_mode=="FST240W") {
-    int stop[] = {39,85,187,387,1003};
-    int stop_EME[] = {48,95,197,396,1012};
+    int stop[] = {39,85,187,387,1003,3092,6233};
+    int stop_EME[] = {48,95,197,396,1012,3102,6243};
     int i=0;
     if(m_TRperiod==30) i=1;
     if(m_TRperiod==60) i=2;
     if(m_TRperiod==120) i=3;
     if(m_TRperiod==300) i=4;
+    if(m_TRperiod==900) i=5;
+    if(m_TRperiod==1800) i=5;
     if(m_config.decode_at_52s()) {
       m_hsymStop=stop_EME[i];
     } else {