diff --git a/lib/fsk4hf/genwspr5.f90 b/lib/fsk4hf/genwspr5.f90
index c052fa2ce..9385a8e14 100644
--- a/lib/fsk4hf/genwspr5.f90
+++ b/lib/fsk4hf/genwspr5.f90
@@ -1,4 +1,4 @@
-subroutine genwspr5(msg,ichk,msgsent,itone,itype)
+subroutine genwspr5(msg,msgsent,itone)
 
 ! Encode a WSPR-LF message, producing array itone().
   
diff --git a/lib/fsk4hf/wspr5sim.f90 b/lib/fsk4hf/wspr5sim.f90
index c7326a2dc..ea84540ff 100644
--- a/lib/fsk4hf/wspr5sim.f90
+++ b/lib/fsk4hf/wspr5sim.f90
@@ -46,7 +46,7 @@ program wspr5sim
   if(snrdb.gt.90.0) sig=1.0
   txt=NN*NSPS0/12000.0
 
-  call genwspr5(msg,ichk,msgsent,itone,itype)  !Encode the message, get itone
+  call genwspr5(msg,msgsent,itone)       !Encode the message, get itone
   write(*,1000) f0,xdt,txt,snrdb,nfiles,msgsent
 1000 format('f0:',f9.3,'   DT:',f6.2,'   txt:',f6.1,'   SNR:',f6.1,    &
           '  nfiles:',i3,2x,a22)
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5bd437077..30766fcc7 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -94,6 +94,8 @@ extern "C" {
 
   void genwspr_(char* msg, char* msgsent, int itone[], int len1, int len2);
 
+  void genwspr5_(char* msg, char* msgsent, int itone[], int len1, int len2);
+
   void geniscat_(char* msg, char* msgsent, int itone[], int len1, int len2);
 
   bool stdmsg_(const char* msg, int len);
@@ -1255,7 +1257,7 @@ void MainWindow::dataSink(qint64 frames)
       m_saveWAVWatcher.setFuture (QtConcurrent::run (std::bind (&MainWindow::save_wave_file,
             this, m_fnameWE, &dec_data.d2[0], m_TRperiod, m_config.my_callsign(),
             m_config.my_grid(), m_mode, m_nSubMode, m_freqNominal, m_hisCall, m_hisGrid)));
-      if (m_mode.startsWith ("WSPR")) {
+      if (m_mode=="WSPR") {
         QString c2name_string {m_fnameWE + ".c2"};
         int len1=c2name_string.length();
         char c2name[80];
@@ -2967,7 +2969,9 @@ void MainWindow::guiUpdate()
         if(m_mode=="QRA64") genqra64_(message, &ichk, msgsent, const_cast<int *> (itone),
                                     &m_currentMessageType, len1, len1);
         if(m_mode=="WSPR") genwspr_(message, msgsent, const_cast<int *> (itone),
-                                             len1, len1);
+                                    len1, len1);
+        if(m_mode=="WSPR-LF") genwspr5_(message, msgsent, const_cast<int *> (itone),
+                                    len1, len1);
         if(m_modeTx=="MSK144") {
           bool bcontest=m_config.contestMode();
           char MyGrid[6];
@@ -5371,8 +5375,7 @@ void MainWindow::transmit (double snr)
            toneSpacing, m_soundOutput, m_config.audio_output_channel (),
            true, false, snr, m_TRperiod);
   }
-  if (m_mode=="WSPR") {         //### Similar code would be needed for WSPR-15 ###
-
+  if (m_mode=="WSPR") {
     int nToneSpacing=1;
     if(m_config.x2ToneSpacing()) nToneSpacing=2;
     Q_EMIT sendMessage (NUM_WSPR_SYMBOLS, 8192.0,
@@ -5381,6 +5384,13 @@ void MainWindow::transmit (double snr)
                         m_config.audio_output_channel(),true, false, snr,
                         m_TRperiod);
   }
+  if (m_mode=="WSPR-LF") {
+    Q_EMIT sendMessage (NUM_WSPR_LF_SYMBOLS, 8640.0,
+                        ui->TxFreqSpinBox->value(),
+                        m_toneSpacing, m_soundOutput,
+                        m_config.audio_output_channel(),true, false, snr,
+                        m_TRperiod);
+  }
   if(m_mode=="Echo") {
     //??? should use "fastMode = true" here ???
     Q_EMIT sendMessage (27, 1024.0, 1500.0, 0.0, m_soundOutput,
diff --git a/mainwindow.h b/mainwindow.h
index e2c1c2bc7..5bf9f9138 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -43,6 +43,7 @@
 #define NUM_JT65_SYMBOLS 126               //63 data + 63 sync
 #define NUM_JT9_SYMBOLS 85                 //69 data + 16 sync
 #define NUM_WSPR_SYMBOLS 162               //(50+31)*2, embedded sync
+#define NUM_WSPR_LF_SYMBOLS 412            //300 data + 109 sync + 3 ramp
 #define NUM_ISCAT_SYMBOLS 1291             //30*11025/256
 #define NUM_MSK144_SYMBOLS 144             //s8 + d48 + s8 + d80
 #define NUM_QRA64_SYMBOLS 84               //63 data + 21 sync