diff --git a/mainwindow.cpp b/mainwindow.cpp
index 6ca0ad488..6094a8acc 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1377,7 +1377,8 @@ void MainWindow::readFromP3()                             //readFromP3
   QByteArray t=p3.readAllStandardOutput();
   QString s=t;
   double fMHz=s.toDouble()/1000000.0;
-  dialFreqChanged2(fMHz);
+  int ndiff=1000000.0*(fMHz-m_dialFreq);
+  if(ndiff!=0) dialFreqChanged2(fMHz);
 }
 
 void MainWindow::killFile()
diff --git a/wsjtx.iss b/wsjtx.iss
index cd6cb3c3d..b6a78aa58 100644
--- a/wsjtx.iss
+++ b/wsjtx.iss
@@ -1,6 +1,6 @@
 [Setup]
 AppName=wsjtx
-AppVerName=wsjtx Version 0.9 r3166
+AppVerName=wsjtx Version 0.9 r3187
 AppCopyright=Copyright (C) 2001-2013 by Joe Taylor, K1JT
 DefaultDirName=c:\wsjtx
 DefaultGroupName=wsjtx