diff --git a/src/portcontrol.h b/src/portcontrol.h
--- a/src/portcontrol.h
+++ b/src/portcontrol.h
@@ -1,5 +1,5 @@
 /*
-  Copyright © 2017 Hasan Yavuz Özderya
+  Copyright © 2019 Hasan Yavuz Özderya
 
   This file is part of serialplot.
 
@@ -47,6 +47,9 @@ public:
     QSerialPort* serialPort;
     QToolBar* toolBar();
 
+    /// Returns maximum bit rate for current baud rate
+    unsigned maxBitRate() const;
+
     /// Stores port settings into a `QSettings`
     void saveSettings(QSettings* settings);
     /// Loads port settings from a `QSettings`. If open serial port is closed.