diff --git a/composer.json b/composer.json
index 38fb2826..c47d48c1 100644
--- a/composer.json
+++ b/composer.json
@@ -75,6 +75,9 @@
         "ext-dom": "Install the DOM extension to load XML formatted public keys."
     },
     "autoload": {
+        "files": [
+            "phpseclib/bootstrap.php"
+        ],
         "psr-4": {
             "phpseclib3\\": "phpseclib/"
         }
diff --git a/phpseclib/bootstrap.php b/phpseclib/bootstrap.php
new file mode 100644
index 00000000..7edc7171
--- /dev/null
+++ b/phpseclib/bootstrap.php
@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Bootstrapping File for phpseclib
+ *
+ * composer isn't a requirement for phpseclib 2.0 but this file isn't really required
+ * either. it's a bonus for those using composer but if you're not phpseclib will
+ * still work
+ *
+ * @license http://www.opensource.org/licenses/mit-license.html MIT License
+ */
+
+// see https://github.com/php/php-src/issues/11917
+if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && function_exists('opcache_get_status') && !defined('PHPSECLIB_ALLOW_JIT')) {
+    $status = opcache_get_status();
+    if ($status['jit']['enabled'] && $status['jit']['on']) {
+        throw new UnexpectedValueException(
+            'JIT on Windows is not currently supported'
+        );
+    }
+}
\ No newline at end of file