diff --git a/README b/README
index bd5421b..7d0460c 100644
--- a/README
+++ b/README
@@ -12,7 +12,7 @@ It is based on Tonokips's firmware, which was licensed under GPL v2 or
 later.
 
 If you are running a current version, after October 2012, see the 
-file arduino-build.txt in Sprinter for build instructions.
+file Arduino-build.txt in Sprinter for build instructions.
 
 WARNING: This version (April 19th, 2011) fixes a bug that caused
     speeds to be lower than what set in GCODE. So before attempting