diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fbfe1a11..bb2e85e36 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -242,7 +242,6 @@ set (wsjt_FSRCS
   lib/entail.f90
   lib/extract.F90
   lib/geocentric.f90
-  lib/f77_wisdom.f90
   lib/fano232.f90
   lib/fchisq.f90
   lib/fchisq65.f90
diff --git a/lib/jt9.f90 b/lib/jt9.f90
index f7584646e..ddf0e793e 100644
--- a/lib/jt9.f90
+++ b/lib/jt9.f90
@@ -74,7 +74,9 @@ program jt9
 1000 format(a40)
   rewind 28
   isuccess=0
-  call import_wisdom_from_file(isuccess,28)
+  wisfile=trim(data_dir)//'/jt9_wisdom.dat'
+  n=len_trim(wisfile)
+  call import_wisdom(wisfile(1:n)//char(0),isuccess)
   close(28)
 30 if(isuccess.ne.0) then
      write(14,1010) firstline
diff --git a/lib/wisdom.c b/lib/wisdom.c
index 59cdd2b68..ef008a7d8 100644
--- a/lib/wisdom.c
+++ b/lib/wisdom.c
@@ -1,4 +1,13 @@
 void export_wisdom_(char fname[], int len)
 {
+  int fftwf_export_wisdom_to_filename(const char *);
+  fname[len-1]=0;
   fftwf_export_wisdom_to_filename(fname);
 }
+
+void import_wisdom_(char fname[], int *success, int len)
+{
+  int fftwf_import_wisdom_from_filename(const char *);
+  fname[len-1]=0;
+  *success = fftwf_import_wisdom_from_filename(fname);
+}
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1d5960e58..0437c86d2 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -380,6 +380,10 @@ MainWindow::MainWindow(bool multiple, QSettings * settings, QSharedMemory *shdme
   proc_jt9.start(QDir::toNativeSeparators (m_appDir) + QDir::separator () +
           "jt9", jt9_args, QIODevice::ReadWrite | QIODevice::Unbuffered);
 
+  QString fname(QDir::toNativeSeparators(m_config.data_path ().absoluteFilePath ("wsjtx_wisdom.dat")));
+  QByteArray cfname=fname.toLocal8Bit();
+  int success = fftwf_import_wisdom_from_filename(cfname);
+
   getpfx();                               //Load the prefix/suffix dictionary
   genStdMsgs(m_rpt);
   m_ntx=6;
@@ -435,6 +439,9 @@ MainWindow::MainWindow(bool multiple, QSettings * settings, QSharedMemory *shdme
 //--------------------------------------------------- MainWindow destructor
 MainWindow::~MainWindow()
 {
+  QString fname(QDir::toNativeSeparators(m_config.data_path ().absoluteFilePath ("wsjtx_wisdom.dat")));
+  QByteArray cfname=fname.toLocal8Bit();
+  fftwf_export_wisdom_to_filename(cfname);
   m_audioThread->wait ();
 }
 
diff --git a/mainwindow.h b/mainwindow.h
index 7166d34f9..c1cd0d56f 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -417,6 +417,9 @@ extern "C" {
 
   int ptt_(int nport, int ntx, int* iptt, int* nopen);
 
+  int fftwf_import_wisdom_from_filename(const char *);
+  int fftwf_export_wisdom_to_filename(const char *);
+
 }
 
 #endif // MAINWINDOW_H