diff --git a/doc/html/index.html b/doc/html/index.html
index 5b905c1..9f97b8b 100644
--- a/doc/html/index.html
+++ b/doc/html/index.html
@@ -114,7 +114,7 @@
       <span class="phrase"><a name="optional.introduction.problem"></a></span><a class="link" href="index.html#optional.introduction.problem">Problem</a>
     </h4>
 <p>
-      Suppose we want to read a parameter form a config file which represents some
+      Suppose we want to read a parameter from a config file which represents some
       integral value, let's call it <code class="computeroutput"><span class="string">"MaxValue"</span></code>.
       It is possible that this parameter is not specified; such situation is no error.
       It is valid to not specify the parameter and in that case the program is supposed