diff --git a/asdf.lisp b/asdf.lisp
index f28fbd0840db154c39d6edd842bd711af3d92954..0482905e2c1dd8a1f6c7ef26865eb0d2cbadcdfd 100644
--- a/asdf.lisp
+++ b/asdf.lisp
@@ -159,7 +159,7 @@
 (in-package #:asdf)
 
 (defvar *asdf-revision* 
-  ;; the 1+ hair is to ensure that we don't do an inadvertant find and replace
+  ;; the 1+ hair is to ensure that we don't do an inadvertent find and replace
   (subseq "REVISION:1.367" (1+ (length "REVISION"))))