diff --git a/phpBB/install/install_install.php b/phpBB/install/install_install.php
index bb3a74ee5e..8e57ed3edd 100644
--- a/phpBB/install/install_install.php
+++ b/phpBB/install/install_install.php
@@ -151,10 +151,10 @@ class install_install extends module
 			'LEGEND_EXPLAIN'	=> $lang['PHP_SETTINGS_EXPLAIN'],
 		));
 
-		// Test the minimum PHP version
+		// Test the minimum and maximum version of PHP
 		$php_version = PHP_VERSION;
 
-		if (version_compare($php_version, '5.3.3') < 0)
+		if ((version_compare($php_version, '5.3.3') < 0) || (version_compare($php_version, '7.0.0-dev', '>=')))
 		{
 			$result = '<strong style="color:red">' . $lang['NO'] . '</strong>';
 		}
diff --git a/phpBB/language/en/install.php b/phpBB/language/en/install.php
index 2542066596..6477a929e9 100644
--- a/phpBB/language/en/install.php
+++ b/phpBB/language/en/install.php
@@ -301,10 +301,10 @@ $lang = array_merge($lang, array(
 	'PHP_REGISTER_GLOBALS_EXPLAIN'	=> 'phpBB will still run if this setting is enabled, but if possible, it is recommended that register_globals is disabled on your PHP install for security reasons.',
 	'PHP_SAFE_MODE'					=> 'Safe mode',
 	'PHP_SETTINGS'					=> 'PHP version and settings',
-	'PHP_SETTINGS_EXPLAIN'			=> '<strong>Required</strong> - You must be running at least version 5.3.3 of PHP in order to install phpBB. If <var>safe mode</var> is displayed below your PHP installation is running in that mode. This will impose limitations on remote administration and similar features.',
+	'PHP_SETTINGS_EXPLAIN'			=> '<strong>Required</strong> - You must be running at least version 5.3.3 of PHP (PHP 7 is not supported) in order to install phpBB. If <var>safe mode</var> is displayed below your PHP installation is running in that mode. This will impose limitations on remote administration and similar features.',
 	'PHP_URL_FOPEN_SUPPORT'			=> 'PHP setting <var>allow_url_fopen</var> is enabled',
 	'PHP_URL_FOPEN_SUPPORT_EXPLAIN'	=> '<strong>Optional</strong> - This setting is optional, however certain phpBB functions like off-site avatars will not work properly without it.',
-	'PHP_VERSION_REQD'				=> 'PHP version >= 5.3.3',
+	'PHP_VERSION_REQD'				=> 'PHP version: >= 5.3.3, < 7.0.0-dev',
 	'POST_ID'						=> 'Post ID',
 	'PREFIX_FOUND'					=> 'A scan of your tables has shown a valid installation using <strong>%s</strong> as table prefix.',
 	'PREPROCESS_STEP'				=> 'Executing pre-processing functions/queries',