diff --git a/cis/private/tools/notebook_registration.php b/cis/private/tools/notebook_registration.php
index 05faf11be..66dbd2486 100644
--- a/cis/private/tools/notebook_registration.php
+++ b/cis/private/tools/notebook_registration.php
@@ -128,7 +128,7 @@ function ip_increment($ip = "")
 					{
 						$VLAN = $mfiles->match[1];
 						$fuser = $mfiles->match[2];
-						$fuser = split(" ", $fuser);
+						$fuser = explode(" ", $fuser);
 						$fuser = $fuser[0];
 						//hier könnte man noch eine email oder dgl. schicken
 						if ($fuser != $txtUID)