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.
 
@@ -50,6 +50,8 @@ public:
     void selectPort(QString portName);
     void selectBaudrate(QString baudRate);
     void openPort();
+    /// Returns maximum bit rate for current baud rate
+    unsigned maxBitRate() const;
 
     /// Stores port settings into a `QSettings`
     void saveSettings(QSettings* settings);