diff --git a/recaptcha.module b/recaptcha.module
index 13a83c4..ae49194 100644
--- a/recaptcha.module
+++ b/recaptcha.module
@@ -103,8 +103,7 @@ function recaptcha_captcha() {
           // If recaptcha is using AJAX API, set caching
           // back to it's old state as stored in DB.
           global $conf;
-          $cache = variable_get('cache', FALSE);
-          $conf['cache'] = $cache;
+          $conf['cache'] = unserialize(db_query("SELECT value FROM {variable} WHERE name = 'cache'")->fetchField());
         }
 
         // Construct the Javascript, but only display it once.