diff --git a/demo/microcom.py b/demo/microcom.py
index 271402d337a4c61534f1a29c7576f14c266fb280..11aea6da35066752f40026ef5fb81246f2704325 100644
--- a/demo/microcom.py
+++ b/demo/microcom.py
@@ -23,7 +23,7 @@ while x.loop():
         # Exit once the user hits Ctrl-].
         break
     elif x.re(user, "(?s)."):
-        # Anything else is sent to the seiral port.
+        # Anything else is sent to the serial port.
         port.send(user.consumed)
     elif x.re(port, "(?s)..*"):
         # Anything that arrives from the serial port is sent to the