diff --git a/gss.module b/gss.module
index fdb2df9..03a78b2 100644
--- a/gss.module
+++ b/gss.module
@@ -137,6 +137,9 @@
   drupal_add_css(drupal_get_path('module', 'gss') . '/gss.css');
   // Include dependencies.
   module_load_include('inc', 'gss', 'includes/GoogleSiteSearch');
+
+  drupal_alter('gss_search_key', $query);
+
   // Make query safe.
   $query = htmlspecialchars($query, ENT_NOQUOTES, 'UTF-8');
   // Init GoogleSiteSearch object.