diff --git a/xCAT-server/lib/xcat/plugins/DBobjectdefs.pm b/xCAT-server/lib/xcat/plugins/DBobjectdefs.pm
index d44b24473..fe5172ab0 100644
--- a/xCAT-server/lib/xcat/plugins/DBobjectdefs.pm
+++ b/xCAT-server/lib/xcat/plugins/DBobjectdefs.pm
@@ -2144,7 +2144,9 @@ sub defch
 
             #  get the @memberlist for static group
             #    - if provided - to use below
-            if ($grptype eq 'static')
+            #  if the static group is not defined in the nodegroup table
+            #  the grptype will be undef
+            if(!$grptype || ($grptype eq 'static'))
             {
 
                 # check for bad cmd line options