diff --git a/files/initrd/opt/rr/serialnumber.yml b/files/initrd/opt/rr/serialnumber.yml
index 83c0852b..9ae6739d 100644
--- a/files/initrd/opt/rr/serialnumber.yml
+++ b/files/initrd/opt/rr/serialnumber.yml
@@ -102,6 +102,13 @@
   middle:
     - "V5R"
   suffix: "alpha"
+"DS1825+":
+  prefix:
+    - "2540"
+  middle:
+    - "WDR"
+  suffix: "alpha"
+  macpre: 9009d0
 "DS2419+":
   prefix:
     - "1880"