diff --git a/user_guide/helpers/security_helper.html b/user_guide/helpers/security_helper.html
index 516e3c0..d45d7c4 100644
--- a/user_guide/helpers/security_helper.html
+++ b/user_guide/helpers/security_helper.html
@@ -76,7 +76,7 @@
<h2>xss_clean()</h2>
-<p>Provides Cross Site Script Hack filtering. This function is an alias to the the one in the
+<p>Provides Cross Site Script Hack filtering. This function is an alias to the one in the
<a href="../libraries/input.html">Input class</a>. More info can be found there.</p>