lib/origen/parameters/set.rb in origen-0.54.2 vs lib/origen/parameters/set.rb in origen-0.54.3

@@ -36,10 +36,10 @@
       alias_method :contexts, :available_contexts
 
       def copy_defaults_from(set)
         set.each do |name, val|
           if val.is_a?(Set)
-            self[name] = new_subset(name)
+            self[name] ||= new_subset(name)
             self[name].copy_defaults_from(val)
           else
             self[name] = val
           end
         end