diff --git a/lib/SimpleSAML/Auth/Simple.php b/lib/SimpleSAML/Auth/Simple.php
index 6eba0b73b9cf202a3afd410d1928942c4a524a4a..156ce1f93d1193da0e84a71e23c8b9de394044dd 100644
--- a/lib/SimpleSAML/Auth/Simple.php
+++ b/lib/SimpleSAML/Auth/Simple.php
@@ -60,7 +60,6 @@ class SimpleSAML_Auth_Simple {
 	 * @param array $options  Various options to the authentication request.
 	 */
 	public function requireAuth(array $options = array()) {
-		assert('is_bool($allowPost)');
 
 		$session = SimpleSAML_Session::getInstance();