diff --git a/oem/ibm/configurations/bios/enum_attrs.json b/oem/ibm/configurations/bios/enum_attrs.json
index 003bc00..1ab33bb 100644
--- a/oem/ibm/configurations/bios/enum_attrs.json
+++ b/oem/ibm/configurations/bios/enum_attrs.json
@@ -182,10 +182,11 @@
          "possible_values":[
             "AIX",
             "Linux",
-            "IBM I"
+            "IBM I",
+            "Default"
          ],
          "default_values":[
-            "AIX"
+            "Default"
          ],
          "helpText" : "CEC Primary OS",
          "displayName" : "CEC Primary OS"
@@ -195,10 +196,11 @@
          "possible_values":[
             "AIX",
             "Linux",
-            "IBM I"
+            "IBM I",
+            "Default"
          ],
          "default_values":[
-            "AIX"
+            "Default"
          ],
          "helpText" : "Specifies the current CEC Primary OS type. Do not set this attribute directly; set pvm_default_os_type instead.",
          "displayName" : "CEC Primary OS (current)"