diff --git a/en_US.ISO8859-1/books/handbook/security/chapter.sgml b/en_US.ISO8859-1/books/handbook/security/chapter.sgml
index 148ff2a969..8d77b2cf36 100644
--- a/en_US.ISO8859-1/books/handbook/security/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/security/chapter.sgml
@@ -5477,7 +5477,7 @@ VII. References<co id="co-ref"></programlisting>
 	<callout arearefs="co-module">
 	  <para>The Module field refers to the component location, for
 	    instance sys.  In this example, we see that the module,
-	    sys, is affected; therefor, this vulnerability
+	    sys, is affected; therefore, this vulnerability
 	    affects a component used within the kernel.</para>
 	</callout>