diff --git a/arduino_timetable/gui.py b/arduino_timetable/gui.py
index 4f5399c..8af8f34 100644
--- a/arduino_timetable/gui.py
+++ b/arduino_timetable/gui.py
@@ -375,7 +375,11 @@ class Application(tk.Frame):
         self._master.destroy()
 
 
-def run_application(available_commands, title='Arduino Scheduled Commands'):
+def run_application(
+    available_commands,
+    title='Arduino Scheduled Commands',
+    icon=None
+    ):
     ''' run the gui application
 
     available_commands:
@@ -383,11 +387,16 @@ def run_application(available_commands, title='Arduino Scheduled Commands'):
 
     title:
         window title bar text
+
+    icon:
+        program icon to use
     '''
 
     # create the Tkinter root and instantiate the application
     root = tk.Tk()
     root.wm_title(title)
+    if icon is not None:
+        root.iconbitmap(icon)
     app = Application(master=root, available_commands=available_commands)
 
     # use app.quit() as callback if the window is closed (with the 'X' button)