diff --git a/soap/datenverbund_client.php b/soap/datenverbund_client.php
index 6c85c394b..1fbf172f5 100644
--- a/soap/datenverbund_client.php
+++ b/soap/datenverbund_client.php
@@ -222,7 +222,7 @@ if (isset($_REQUEST['submit']))
 
 		case 'setMatrikelnummer':
 			$person = new stdClass();
-			$person->matrikelnummer = $matrikelnummer;
+			$person->matrikelnummer = $matrikelnr;
 			$person->vorname = $vorname;
 			$person->nachname = $nachname;
 			$person->geburtsdatum = $geburtsdatum;