diff --git a/doc/divert.html b/doc/divert.html
index e001747..7e5266d 100644
--- a/doc/divert.html
+++ b/doc/divert.html
@@ -210,7 +210,7 @@ The WinDivert driver is installed on demand, i.e., when your application
 makes a call to <a href="#divert_open"><tt>DivertOpen()</tt></a> from
 <tt>WinDivert.dll</tt>.
 The driver is installed silently.
-The calling application by be running with Administrator privileges.
+The calling application must be running with Administrator privileges.
 </p>
 
 <hr>