diff --git a/recacher.module b/recacher.module
index a1a86f0..9716cef 100644
--- a/recacher.module
+++ b/recacher.module
@@ -200,8 +200,12 @@ function recacher_crawler() {
     // Let other modules alter options and headers sent via HTTPRL.
     drupal_alter('recacher_role_options', $recacher_role_options);
 
-    // Trigger hook_recacher_role_options().
-    $recacher_role_options = module_invoke_all('recacher_role_options', $recacher_role_options);
+    // Test if there are any modules implementing hook_recacher_role_options().
+    // Without this test, no implementations would empty variable $recacher_role_options.
+    if (sizeof(module_implements('recacher_role_options')) > 0) {
+      // Trigger hook_recacher_role_options().
+      $recacher_role_options = module_invoke_all('recacher_role_options', $recacher_role_options);
+    }
 
     foreach ($dburls as $dburl) {
       foreach ($recacher_role_options as $role => $options) {
@@ -212,7 +216,6 @@ function recacher_crawler() {
 
     // Execute request.
     $request = httprl_send_request();
-    //dpm($request);
 
     $codes = array();
     foreach ($request as $url => $probe) {
diff --git a/recacher_settings.inc b/recacher_settings.inc
index 94ebd08..34beede 100644
--- a/recacher_settings.inc
+++ b/recacher_settings.inc
@@ -51,12 +51,12 @@ function recacher_admin($form, &$form_state) {
   $form['recrawler_hook_exit'] = array(
     '#type' => 'checkbox',
     '#title' => t('Try recrawling immediately'),
-    '#description' => t('Start the recaching process at the end of the current page request (uses "hook_exit()"). It is generally safer to re-cache on cron, especially if when expiring external cache such as Fastly or Akamai (see https://www.drupal.org/node/2828873).'),
+    '#description' => t('Start the re-caching process at the end of the current page request (uses "hook_exit()"). It is generally safer to re-cache on cron, especially when expiring external cache such as Fastly or Akamai (see https://www.drupal.org/node/2828873).'),
     '#default_value' => variable_get('recrawler_hook_exit', FALSE),
   );
 
   $form['recacher_run_now'] = array(
-    '#markup' => '<p>'. l(t('Re-cache immediately'), 'admin/config/system/recacher/crawl') . ': ' . t('don\'t wait for the cron to run; warm caches of the expired pages immediately.') . '',
+    '#markup' => '<p>'. l(t('Re-cache immediately'), 'admin/config/system/recacher/crawl') . ': ' . t('click to warm caches of the expired pages immediately.') . '',
   );
 
   return system_settings_form($form);