diff --git a/lib/mini_record/auto_schema.rb b/lib/mini_record/auto_schema.rb
index cd8cdea..88f418f 100644
--- a/lib/mini_record/auto_schema.rb
+++ b/lib/mini_record/auto_schema.rb
@@ -240,7 +240,11 @@ def field_attr_changes(field_name)
         # This catches stuff like :null, :precision, etc
         # Ignore junk attributes that different versions of Rails include
         [:name, :limit, :precision, :scale, :default, :null].each do |att|
-          value = fields[field][att]
+          if fields[field].respond_to? :members
+            value = fields[field].members.include?(att) ? fields[field][att] : nil
+          else
+            value = fields[field][att]
+          end
           value = true if att == :null && value.nil?
 
           # Skip unspecified limit/precision/scale as DB will set them to defaults,