diff --git a/lib/nav.php b/lib/nav.php
index 6728f1e..45ed870 100644
--- a/lib/nav.php
+++ b/lib/nav.php
@@ -52,6 +52,14 @@ class Sage_Nav_Walker extends \Walker_Nav_Menu {
   }
 }
 
+/**
+ * Check if element is empty
+ */
+function is_element_empty($element) {
+  $element = trim($element);
+  return !empty($element);
+}
+
 /**
  * Remove the id="" on nav menu items
  * Return 'menu-slug' for nav menu classes
@@ -65,7 +73,7 @@ function nav_menu_css_class($classes, $item) {
 
   $classes = array_unique($classes);
 
-  return array_filter($classes, 'Roots\\Sage\\Utils\\is_element_empty');
+  return array_filter($classes, __NAMESPACE__ . '\\is_element_empty');
 }
 add_filter('nav_menu_css_class', __NAMESPACE__ . '\\nav_menu_css_class', 10, 2);
 add_filter('nav_menu_item_id', '__return_null');
diff --git a/lib/utils.php b/lib/utils.php
index fc1be36..d7d02fc 100644
--- a/lib/utils.php
+++ b/lib/utils.php
@@ -3,14 +3,8 @@
 namespace Roots\Sage\Utils;
 
 /**
- * Utility functions
+ * Tell WordPress to use searchform.php from the templates/ directory
  */
-function is_element_empty($element) {
-  $element = trim($element);
-  return !empty($element);
-}
-
-// Tell WordPress to use searchform.php from the templates/ directory
 function get_search_form() {
   $form = '';
   locate_template('/templates/searchform.php', true, false);
@@ -22,7 +16,6 @@ add_filter('get_search_form', __NAMESPACE__ . '\\get_search_form');
  * Add page slug to body_class() classes if it doesn't exist
  */
 function body_class($classes) {
-  // Add post/page slug
   if (is_single() || is_page() && !is_front_page()) {
     if (!in_array(basename(get_permalink()), $classes)) {
       $classes[] = basename(get_permalink());