diff --git a/Documentation/SM501.txt b/Documentation/SM501.txt
index 6fc6560..561826f 100644
--- a/Documentation/SM501.txt
+++ b/Documentation/SM501.txt
@@ -5,7 +5,7 @@
 
 The Silicon Motion SM501 multimedia companion chip is a multifunction device
 which may provide numerous interfaces including USB host controller USB gadget,
-Asyncronous Serial ports, Audio functions and a dual display video interface.
+asynchronous serial ports, audio functions, and a dual display video interface.
 The device may be connected by PCI or local bus with varying functions enabled.
 
 Core