diff --git a/installer/web.php b/installer/web.php
index a7060bd891..5fa8541eb4 100644
--- a/installer/web.php
+++ b/installer/web.php
@@ -41,9 +41,9 @@
     list ($config["host"], $config["port"]) = explode(":", $config["host"] . ":");
     foreach ($config as $k => $v) {
       if ($k == "password") {
-        $config[$k] = str_replace("'", "\\'", $v);
+        $config[$k] = str_replace(array("'", "\\"), array("\\'", "\\\\"), $v);
       } else {
-        $config[$k] = strtr($v, "'`", "__");
+        $config[$k] = strtr($v, "'`\\", "___");
       }
     }