diff --git a/setup/cli/modules/deploy.php b/setup/cli/modules/deploy.php
index 3d959b393815fce5e95305b7d16c82c41f65c91c..06d1a20428a9d012c0544d01e6c539cc900f163a 100644
--- a/setup/cli/modules/deploy.php
+++ b/setup/cli/modules/deploy.php
@@ -114,7 +114,7 @@ class Deployment extends Unpacker {
             $source);
         // Set THIS_VERSION
         $source = preg_replace("/^(\s*)define\s*\(\s*'THIS_VERSION'.*$/m",
-            "\1define('THIS_VERSION', '".$version."'); // Set by installer",
+            "$1define('THIS_VERSION', '".$version."'); // Set by installer",
             $source);
         // Disable error display
         $source = preg_replace("/^(\s*)ini_set\s*\(\s*'(display_errors|display_startup_errors)'.*$/m",