diff --git a/includes/plugins.inc b/includes/plugins.inc
index 46baaca..b470668 100644
--- a/includes/plugins.inc
+++ b/includes/plugins.inc
@@ -173,9 +173,12 @@ class panels_cache_object {
     $start = $this->js;
     $this->js = array();
 
+    // Use the advanced mapping function from Drupal >= 7.23 if available.
+    $array_mapping_func = function_exists('drupal_array_diff_assoc_recursive') ? 'drupal_array_diff_assoc_recursive' : 'array_diff_assoc';
+
     // If there are any differences between the old and the new javascript then
     // store them to be added later.
-    if ($diff = drupal_array_diff_assoc_recursive($js, $start)) {
+    if ($diff = $array_mapping_func($js, $start)) {
       // Iterate over the diff to ensure we keep the keys on merge and don't add
       // unnecessary items.
       foreach ($diff as $key => $diff_data) {
diff --git a/panels.info b/panels.info
index 5aa334b..70b961d 100644
--- a/panels.info
+++ b/panels.info
@@ -4,7 +4,6 @@ core = 7.x
 package = "Panels"
 configure = admin/structure/panels
 dependencies[] = ctools
-dependencies[] = system (>=7.23)
 files[] = panels.module
 files[] = includes/common.inc
 files[] = includes/legacy.inc