diff --git a/radioactivity.module b/radioactivity.module
index 6b4756e..e93317f 100644
--- a/radioactivity.module
+++ b/radioactivity.module
@@ -270,7 +270,7 @@ function _radioactivity_get_storage($key) {
       $cache[$key] = new $class();
     }
     else {
-      watchdog('radioactivity', 'Tried to use a storage @class that is not defined.', array('@class' => $class, WATCHDOG_CRITICAL);
+      watchdog('radioactivity', 'Tried to use a storage @class that is not defined.', array('@class' => $class, WATCHDOG_CRITICAL));
       return FALSE;
     }
   }