1 files changed, 7 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 732029c723..ea3e0d6a45 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -26,9 +26,15 @@ module ActiveRecord
         end
       end
 
+      def inspect
+        Kernel.instance_method(:inspect).bind(self).call
+      end
+
       def changed_in_place?(raw_old_value, value)
         return false if value.nil?
-        subtype.changed_in_place?(raw_old_value, serialize(value))
+        raw_new_value = serialize(value)
+        raw_old_value.nil? != raw_new_value.nil? ||
+          subtype.changed_in_place?(raw_old_value, raw_new_value)
       end
 
       def accessor