diff --git a/lib/SimpleSAML/Session.php b/lib/SimpleSAML/Session.php
index 912d52be32f2be10f608146e0096671ff3a6f6a6..4a76ac18dd059a8cb2ef0aa375a40d2c4dba457a 100644
--- a/lib/SimpleSAML/Session.php
+++ b/lib/SimpleSAML/Session.php
@@ -313,9 +313,6 @@ class SimpleSAML_Session {
 		$this->sessionindex = $sessionindex;
 	}
 	public function getSessionIndex() {
-		if($this->sessionindex === NULL) {
-			$this->sessionindex = SimpleSAML_Utilities::generateID();
-		}
 		return $this->sessionindex;
 	}
 	public function setNameID($nameid) {