diff --git a/libraries.module b/libraries/libraries.module
index 0448476..ee6b5a3 100644
--- a/libraries.module
+++ b/libraries.module
@@ -694,7 +694,7 @@ function libraries_load($name, $variant = NULL) {
  */
 function libraries_load_files($library) {
   // Load integration files.
-  if (!$library['post-load integration files'] && !empty($library['integration files'])) {
+  if ((!isset($library['post-load integration files']) || !$library['post-load integration files']) && !empty($library['integration files'])) {
     $enabled_themes = array();
     foreach (list_themes() as $theme_name => $theme) {
       if ($theme->status) {
@@ -772,7 +772,7 @@ function libraries_load_files($library) {
   }

   // Load integration files.
-  if ($library['post-load integration files'] && !empty($library['integration files'])) {
+  if ((isset($library['post-load integration files']) && $library['post-load integration files']) && !empty($library['integration files'])) {
     $enabled_themes = array();
     foreach (list_themes() as $theme_name => $theme) {
       if ($theme->status) {