diff --git a/docs/manual/dirtasks.html b/docs/manual/dirtasks.html
index b73e1c2aa..b57af5dd8 100644
--- a/docs/manual/dirtasks.html
+++ b/docs/manual/dirtasks.html
@@ -32,7 +32,7 @@ which can be used at the same time:</p>
 
 <p>We said that Directory-based tasks can sometimes act as an implicit
 <a href="CoreTypes/fileset.html"><code>&lt;fileset&gt;</code></a>,
-but in addtion to that, a FileSet acts as an implicit
+but in addition to that, a FileSet acts as an implicit
 <a href="CoreTypes/patternset.html"><code>&lt;patternset&gt;</code></a>.</p>
 
 <p>The inclusion and exclusion elements of the implicit PatternSet can be