diff --git a/phpBB/phpbb/install/installer.php b/phpBB/phpbb/install/installer.php
index bdff62e0b1..77e0a896bc 100644
--- a/phpBB/phpbb/install/installer.php
+++ b/phpBB/phpbb/install/installer.php
@@ -191,7 +191,7 @@ class installer
 			else
 			{
 				global $SID;
-				$acp_url = $this->web_root . '/adm/index.php' . $SID;
+				$acp_url = $this->web_root . 'adm/index.php' . $SID;
 				$this->iohandler->add_success_message('INSTALLER_FINISHED', array(
 					'ACP_LINK',
 					$acp_url,