diff --git a/common/autoload.php b/common/autoload.php
index 9ce12432d..35123d5cd 100644
--- a/common/autoload.php
+++ b/common/autoload.php
@@ -8,6 +8,16 @@ if (defined('RX_VERSION'))
 	return;
 }
 
+/**
+ * Check PHP version.
+ */
+if (version_compare(PHP_VERSION, '7.2', '<'))
+{
+	header('HTTP/1.1 500 Internal Server Error');
+	echo 'Rhymix requires PHP 7.2 or higher.';
+	exit(1);
+}
+
 /**
  * Set error reporting rules.
  */