diff --git a/collects/setup/unixstyle-install.rkt b/collects/setup/unixstyle-install.rkt
index 0772afc224..e21c049b13 100644
--- a/collects/setup/unixstyle-install.rkt
+++ b/collects/setup/unixstyle-install.rkt
@@ -58,7 +58,7 @@
       [(lib)      1]
       [(man)      #f]
       [(src)      1]
-      [(readme.txt) #f] ; moved last
+      [(README)   #f] ; moved last
       [else (error 'level-of "internal-error -- unknown dir: ~e" dir)])))
 
 (define (make-path . args) ; like build-path but returns a string