diff --git a/lass/1systems/mors/config.nix b/lass/1systems/mors/config.nix
index 4d2f8b0f8..f6bfa02b3 100644
--- a/lass/1systems/mors/config.nix
+++ b/lass/1systems/mors/config.nix
@@ -38,7 +38,7 @@ with import <stockholm/lib>;
     {
       lass.umts = {
         enable = true;
-        modem = "/dev/serial/by-id/usb-Lenovo_F5521gw_C12AD95CB7B78F90-if09";
+        modem = "/dev/serial/by-id/usb-Lenovo_F5521gw_2C7D8D7C35FC7040-if09";
         initstrings = ''
           Init1 = AT+CFUN=1
           Init2 = AT+CGDCONT=1,"IP","pinternet.interkom.de","",0,0