diff --git a/doc/api.html b/doc/api.html
index aac87a769c..0160ee5316 100644
--- a/doc/api.html
+++ b/doc/api.html
@@ -86,7 +86,7 @@ If the BOINC client quits or exits,
 the computation can be restarted from the most recent checkpoint.
 
 <p>
-Do use checkpoint, an application should write to output and
+To use checkpoint, an application should write to output and
 state files using the <tt>MFILE</tt> class.
 <pre>
 class MFILE {