diff --git a/phpBB/includes/startup.php b/phpBB/includes/startup.php
index 7450ca8707..5ead3b7fbb 100644
--- a/phpBB/includes/startup.php
+++ b/phpBB/includes/startup.php
@@ -25,7 +25,7 @@ error_reporting($level);
 /**
 * Minimum Requirement: PHP 7.1.3
 */
-if (version_compare(PHP_VERSION, '7.1.3') < 0)
+if (version_compare(PHP_VERSION, '7.1.3', '<'))
 {
 	die('You are running an unsupported PHP version. Please upgrade to PHP 7.1.3 or higher before trying to install or update to phpBB 3.3');
 }
diff --git a/phpBB/install/app.php b/phpBB/install/app.php
index 4b3be11e98..0e6212e37a 100644
--- a/phpBB/install/app.php
+++ b/phpBB/install/app.php
@@ -20,7 +20,7 @@ define('PHPBB_ENVIRONMENT', 'production');
 $phpbb_root_path = '../';
 $phpEx = substr(strrchr(__FILE__, '.'), 1);
 
-if (version_compare(PHP_VERSION, '7.1.3') < 0)
+if (version_compare(PHP_VERSION, '7.1.3', '<'))
 {
 	die('You are running an unsupported PHP version. Please upgrade to PHP 7.1.3 or higher before trying to install or update to phpBB 3.3');
 }
diff --git a/phpBB/phpbb/install/module/requirements/task/check_server_environment.php b/phpBB/phpbb/install/module/requirements/task/check_server_environment.php
index 93fffb911f..41aa82623b 100644
--- a/phpBB/phpbb/install/module/requirements/task/check_server_environment.php
+++ b/phpBB/phpbb/install/module/requirements/task/check_server_environment.php
@@ -96,9 +96,7 @@ class check_server_environment extends \phpbb\install\task_base
 	 */
 	protected function check_php_version()
 	{
-		$php_version = PHP_VERSION;
-
-		if (version_compare($php_version, '7.1.3') < 0)
+		if (version_compare(PHP_VERSION, '7.1.3', '<'))
 		{
 			$this->response_helper->add_error_message('PHP_VERSION_REQD', 'PHP_VERSION_REQD_EXPLAIN');