diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index 18f44e2..4a000b5 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -657,7 +657,7 @@ function variable_initialize($conf = array()) {
     }
     else {
       // Proceed with variable rebuild.
-      $variables = array_map('unserialize', db_query('SELECT name, value FROM {variable}')->fetchAllKeyed());
+      $variables = array_map("unserialize", db_query('SELECT name, value FROM {variable}')->fetchAllKeyed());
       cache_set('variables', $variables, 'cache_bootstrap');
       lock_release($name);
     }