diff --git a/yaml/com/ibm/VPD.errors.yaml b/yaml/com/ibm/VPD.errors.yaml
index da408f0..514a449 100644
--- a/yaml/com/ibm/VPD.errors.yaml
+++ b/yaml/com/ibm/VPD.errors.yaml
@@ -23,3 +23,8 @@
   description: Invalid Json file.
 - name: DbusFailure
   description: DBus error occurred.
+- name: UnknownSystemType
+  description:
+      Could not determine which device tree to switch to, as system type is
+      unknown. Please check the HW and  IM keywords in the system VPD and check
+      if they are programmed correctly.