diff --git a/README.WINDOWS b/README.WINDOWS
index 07c3c05..7b17098 100644
--- a/README.WINDOWS
+++ b/README.WINDOWS
@@ -1,4 +1,4 @@
-Dear calc user on a Windoz based system,
+Dear calc user on a Windows based system,
 
 See the HOWTO.INSTALL file for information on how to build and install calc.
 See also the README file.