3 files changed, 5 insertions, 9 deletions
diff --git a/activerecord/lib/active_record/type/numeric.rb b/activerecord/lib/active_record/type/numeric.rb
index d5cb13233c..137c9e4c99 100644
--- a/activerecord/lib/active_record/type/numeric.rb
+++ b/activerecord/lib/active_record/type/numeric.rb
@@ -15,11 +15,11 @@ module ActiveRecord
         super(value)
       end
 
-      def changed?(old_value, new_value) # :nodoc:
+      def changed?(old_value, _new_value, new_value_before_type_cast) # :nodoc:
         # 0 => 'wibble' should mark as changed so numericality validations run
-        if nil_or_zero?(old_value) && non_numeric_string?(new_value)
+        if nil_or_zero?(old_value) && non_numeric_string?(new_value_before_type_cast)
           # nil => '' should not mark as changed
-          old_value != new_value.presence
+          old_value != new_value_before_type_cast.presence
         else
           super
         end
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 94d9d9a549..0866383de9 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -36,10 +36,6 @@ module ActiveRecord
 
       private
 
-      def changed?(old_value, new_value) # :nodoc:
-        old_value != new_value
-      end
-
       def is_default_value?(value)
         value == coder.load(nil)
       end
diff --git a/activerecord/lib/active_record/type/value.rb b/activerecord/lib/active_record/type/value.rb
index 4bc3086db3..1c41b28646 100644
--- a/activerecord/lib/active_record/type/value.rb
+++ b/activerecord/lib/active_record/type/value.rb
@@ -59,8 +59,8 @@ module ActiveRecord
       # or from assignment, so it could be anything. Types
       # which cannot typecast arbitrary values should override
       # this method.
-      def changed?(old_value, new_value) # :nodoc:
-        old_value != type_cast(new_value)
+      def changed?(old_value, new_value, _new_value_before_type_cast) # :nodoc:
+        old_value != new_value
       end
 
       private