diff --git a/lib/migration_generator/migration_generator.ex b/lib/migration_generator/migration_generator.ex
index 86920ed4..1a3a396d 100644
--- a/lib/migration_generator/migration_generator.ex
+++ b/lib/migration_generator/migration_generator.ex
@@ -3489,7 +3489,7 @@ defmodule AshPostgres.MigrationGenerator do
 
   @uuid_functions [&Ash.UUID.generate/0, &Ecto.UUID.generate/0]
 
-  defp default(%{name: name, default: default}, resource, _repo) when is_function(default) do
+  defp default(%{name: name, default: default, type: type}, resource, _repo) when is_function(default) do
     configured_default(resource, name) ||
       cond do
         default in @uuid_functions ->
@@ -3498,6 +3498,9 @@ defmodule AshPostgres.MigrationGenerator do
         default == (&Ash.UUIDv7.generate/0) ->
           ~S[fragment("uuid_generate_v7()")]
 
+        default == (&DateTime.utc_now/0) && type == AshPostgres.Timestamptz ->
+          ~S[fragment("now()")]
+
         default == (&DateTime.utc_now/0) ->
           ~S[fragment("(now() AT TIME ZONE 'utc')")]