diff --git a/typemallow2/__init__.py b/typemallow2/__init__.py
index 24ba0a8..1c50c6b 100644
--- a/typemallow2/__init__.py
+++ b/typemallow2/__init__.py
@@ -106,7 +106,10 @@ def __get_ts_interface(schema):
     ts_fields = []
     for key, value in schema._declared_fields.items():
         if type(value) is fields.Nested:
-            ts_type = value.nested.__name__.replace('Schema', '')
+            if type(value.nested) is str:
+                ts_type = value.nested.replace('Schema', '')
+            else:
+                ts_type = value.nested.__name__.replace('Schema', '')
             if value.many:
                 ts_type += '[]'
         elif type(value) is EnumField: