diff --git a/lib/decoder.f90 b/lib/decoder.f90
index e86f993da..ebcba23fa 100644
--- a/lib/decoder.f90
+++ b/lib/decoder.f90
@@ -1,4 +1,4 @@
-subroutine decoder(ntrSeconds,c0)
+subroutine decoder(ntrSeconds,nRxLog,c0)
 
 ! Decoder for JT9.  Can run stand-alone, reading data from *.wav files;
 ! or as the back end of wsjt-x, with data placed in a shared memory region.
@@ -63,6 +63,10 @@ subroutine decoder(ntrSeconds,c0)
      open(14,file='wsjtx_rx.log',status='unknown',position='append')
      first=.false.
   endif
+  if(iand(nRxLog,2).ne.0) rewind 14
+  if(iand(nRxLog,1).ne.0) then
+! Write date and time to lu 14     
+  endif
   write(14,1010) nutc,nsync,nsnr,xdt,1000.0+fpk,width,msg
   call flush(14)
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index d2939f8cf..a76405581 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -859,7 +859,9 @@ void MainWindow::decode()                                       //decode()
   jt9com_.nfqso=g_pWideGraph->QSOfreq();
   m_tol=g_pWideGraph->Tol();
   jt9com_.ntol=m_tol;
-  *future3 = QtConcurrent::run(decoder_, &m_TRperiod, &c0[0]);
+  if(jt9com_.nutc < m_nutc0) m_RxLog |= 1;  //Date and Time to wsjtx_rx.log
+  m_nutc0=jt9com_.nutc;
+  *future3 = QtConcurrent::run(decoder_, &m_TRperiod, &m_RxLog, &c0[0]);
   watcher3->setFuture(*future3);
 }
 
@@ -1342,7 +1344,6 @@ void MainWindow::on_logQSOButton_clicked()                 //Log QSO button
   f.close();
 }
 
-/*
 void MainWindow::on_actionErase_wsjtx_rx_log_triggered()     //Erase Rx log
 {
   int ret = QMessageBox::warning(this, "Confirm Erase",
@@ -1352,7 +1353,6 @@ void MainWindow::on_actionErase_wsjtx_rx_log_triggered()     //Erase Rx log
     m_RxLog |= 2;                      // Rewind wsjtx_rx.log
   }
 }
-*/
 
 void MainWindow::on_actionErase_wsjtx_tx_log_triggered()     //Erase Tx log
 {
diff --git a/mainwindow.h b/mainwindow.h
index 4cf8a89be..4beb80360 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -96,7 +96,7 @@ private slots:
   void on_genStdMsgsPushButton_clicked();
   void bumpDF(int n);
   void on_logQSOButton_clicked();
-//  void on_actionErase_wsjtx_rx_log_triggered();
+  void on_actionErase_wsjtx_rx_log_triggered();
   void on_actionErase_wsjtx_tx_log_triggered();
   void on_actionAFMHot_triggered();
   void on_actionBlue_triggered();
@@ -225,7 +225,7 @@ void symspec_(int* k, int* ntrperiod, int* nsps, int* nb, int* m_NBslider,
 
 void genjt9_(char* msg, char* msgsent, int itone[], int len1, int len2);
 
-void decoder_(int* ntrperiod, float c0[]);
+void decoder_(int* ntrperiod, int* mRxLog, float c0[]);
 
 int ptt_(int* nport, int* itx, int* iptt);
   }