diff --git a/phpBB/install/install_update.php b/phpBB/install/install_update.php
index 5393040061..5419e3edf1 100644
--- a/phpBB/install/install_update.php
+++ b/phpBB/install/install_update.php
@@ -204,7 +204,7 @@ class install_update extends module
 		}
 
 		// Check if the update files stored are for the latest version...
-		if (version_compare(strtolower($this->latest_version), strtolower($this->update_info['version']['to']), '>'))
+		if (phpbb_version_compare($this->latest_version, $this->update_info['version']['to'], '>'))
 		{
 			$this->unequal_version = true;