diff --git a/rrssb.module b/rrssb.module
index 57a8038..6524206 100644
--- a/rrssb.module
+++ b/rrssb.module
@@ -368,7 +368,7 @@ function rrssb_requirements($phase) {
       }
     }
     
-    if ($requirements['rrssb']['severity'] != REQUIREMENT_OK) {
+    if ($requirements['rrssb']['severity'] != REQUIREMENT_OK && array_key_exists('description', $requirements['rrssb'])) {
       $requirements['rrssb']['description'] .= 
         t('Please download the RRSSB library using "drush rrssb-plugin" or from !link.', array('!link' => l(RRSSB_LIBRARY_URI, RRSSB_LIBRARY_URI)));
     }