diff --git a/lib/SimpleSAML/Utilities.php b/lib/SimpleSAML/Utilities.php
index 4f29a96d2c18a4da4ef442078c559aed702391e4..aadb5889066d705c85b6a259aa46f957c2dfb0ca 100644
--- a/lib/SimpleSAML/Utilities.php
+++ b/lib/SimpleSAML/Utilities.php
@@ -1080,7 +1080,8 @@ class SimpleSAML_Utilities {
 		for($i = 0; $i < $length; $i++) {
 			$data .= chr(mt_rand(0, 255));
 		}
-	
+
+		return $data;
 	}