diff --git a/wp-content/themes/twentythirteen/404.php b/wp-content/themes/twentythirteen/404.php
index eebc34b706..131a1340a9 100644
--- a/wp-content/themes/twentythirteen/404.php
+++ b/wp-content/themes/twentythirteen/404.php
@@ -13,7 +13,7 @@ get_header(); ?>
 		<div id="content" class="site-content" role="main">
 
 			<header class="page-header">
-				<h1 class="page-title"><?php _e( 'Not Found', 'twentythirteen' ); ?></h1>
+				<h1 class="page-title"><?php _e( 'Not found', 'twentythirteen' ); ?></h1>
 			</header>
 
 			<div class="page-wrapper">
diff --git a/wp-content/themes/twentythirteen/languages/twentythirteen.pot b/wp-content/themes/twentythirteen/languages/twentythirteen.pot
index 7856006157..c5b2508a2d 100644
--- a/wp-content/themes/twentythirteen/languages/twentythirteen.pot
+++ b/wp-content/themes/twentythirteen/languages/twentythirteen.pot
@@ -13,7 +13,7 @@ msgstr ""
 "Language-Team: LANGUAGE <LL@li.org>\n"
 
 #: 404.php:16
-msgid "Not Found"
+msgid "Not found"
 msgstr ""
 
 #: 404.php:21