diff --git a/inc/roots-scripts.php b/inc/roots-scripts.php
index 1522b75..706d0c9 100644
--- a/inc/roots-scripts.php
+++ b/inc/roots-scripts.php
@@ -14,8 +14,16 @@ if (!is_admin()) {
 }
 
 function roots_print_scripts() {
+  if (!is_admin()) {
+    return;
+  }
+
   global $wp_scripts;
 
+  if (!is_a($wp_scripts, 'WP_Scripts')) {
+    return;
+  }
+
   $wp_scripts->all_deps($wp_scripts->queue);
   $scripts = $locales = array();
   $queue = $wp_scripts->queue;