diff --git a/httprl.install b/httprl.install
index d883142..b66a136 100644
--- a/httprl.install
+++ b/httprl.install
@@ -120,7 +120,12 @@ function httprl_requirements($phase) {
     // hostname.
     $ip = variable_get('httprl_server_addr', FALSE);
     if (!empty($ip)) {
-      $x = @unserialize(db_result(db_query("SELECT value FROM {variable} WHERE name = 'httprl_server_addr'")));
+      if (substr(VERSION, 0, 1) >= 7) {
+        $x = @unserialize(db_query("SELECT value FROM {variable} WHERE name = :name", array(':name' => 'httprl_server_addr'))->fetchField());
+      }
+      else {
+        $x = @unserialize(db_result(db_query("SELECT value FROM {variable} WHERE name = 'httprl_server_addr'")));
+      }
       if ($ip != $x && $ip == -1) {
         variable_set('httprl_server_addr', -1);
       }