diff --git a/graphene_django/converter.py b/graphene_django/converter.py
index 121c1de..ef6d640 100644
--- a/graphene_django/converter.py
+++ b/graphene_django/converter.py
@@ -183,19 +183,13 @@ def convert_field_to_string(field, registry=None):
     )
 
 
+@convert_django_field.register(models.SmallAutoField)
 @convert_django_field.register(models.BigAutoField)
 @convert_django_field.register(models.AutoField)
 def convert_field_to_id(field, registry=None):
     return ID(description=get_django_field_description(field), required=not field.null)
 
 
-if hasattr(models, "SmallAutoField"):
-
-    @convert_django_field.register(models.SmallAutoField)
-    def convert_field_small_to_id(field, registry=None):
-        return convert_field_to_id(field, registry)
-
-
 @convert_django_field.register(models.UUIDField)
 def convert_field_to_uuid(field, registry=None):
     return UUID(
diff --git a/graphene_django/tests/test_converter.py b/graphene_django/tests/test_converter.py
index e8c0920..69913ae 100644
--- a/graphene_django/tests/test_converter.py
+++ b/graphene_django/tests/test_converter.py
@@ -115,8 +115,7 @@ def test_should_big_auto_convert_id():
 
 
 def test_should_small_auto_convert_id():
-    if hasattr(models, "SmallAutoField"):
-        assert_conversion(models.SmallAutoField, graphene.ID, primary_key=True)
+    assert_conversion(models.SmallAutoField, graphene.ID, primary_key=True)
 
 
 def test_should_uuid_convert_id():