diff --git a/rest_models/__init__.py b/rest_models/__init__.py
index c873ab2..c0360d9 100644
--- a/rest_models/__init__.py
+++ b/rest_models/__init__.py
@@ -1,4 +1,4 @@
-__VERSION__ = '1.8.1'
+__VERSION__ = '1.8.2'
 
 try:
     from rest_models.checks import register_checks
diff --git a/rest_models/backend/compiler.py b/rest_models/backend/compiler.py
index 4e1692e..34022f3 100644
--- a/rest_models/backend/compiler.py
+++ b/rest_models/backend/compiler.py
@@ -7,6 +7,7 @@
 import re
 from collections import defaultdict, namedtuple
 
+import six
 from django.core.exceptions import ImproperlyConfigured
 from django.db.models import FileField, Transform
 from django.db.models.aggregates import Count
@@ -1289,12 +1290,17 @@ def resolve_data_n_files(self):
             if isinstance(field, FileField):
                 fieldfile = field.pre_save(val.instance, False)
                 # file.name is the return of our storage.save => we get the content file instead of his name
-                # to retreive it there.
+                # file.name can be a string, in this case, we did got the file at all, he is unmodified
                 file = fieldfile.name
-                if file is not None:  # field value can be None....
-                    files[field.column] = (file.name, file, file.content_type)
-                else:
+                if file is None:
+                    # field can be set to None
                     data[field.column] = None
+                elif isinstance(file, six.string_types):
+                    # str => we don't change it since it's not comming from our custom storage
+                    pass
+                else:
+                    files[field.column] = (file.name, file, file.content_type)
+
             else:
                 fieldname = field.concrete and field.db_column or field.name
                 data[fieldname] = field.get_db_prep_save(val, connection=self.connection)
diff --git a/rest_models/tests/tests_upload_files.py b/rest_models/tests/tests_upload_files.py
index 85fb5fa..4e6b470 100644
--- a/rest_models/tests/tests_upload_files.py
+++ b/rest_models/tests/tests_upload_files.py
@@ -182,3 +182,23 @@ def test_null_value_update_from_client(self):
         self.assertEqual(review_client.photo.url, 'http://testserver/media/%s' % self.img_name2)
         self.assertEqual(review_client.photo.file.read(), image_test)
         self.assertEqual(review_client.comment, 'comment')
+
+    def test_save_unchanged_file(self):
+
+        review_api = apimodels.Review.objects.create(
+            comment="coucou",
+            photo=SimpleUploadedFile(self.img_name, image_test, 'image/png'),
+        )
+
+        review_client = clientmodels.Review.objects.get(pk=review_api.pk)
+        self.assertEqual(review_client.photo.url, 'http://testserver/media/%s' % self.img_name)
+        self.assertEqual(review_client.photo.name, self.img_name)
+
+        review_client.save()
+        self.assertEqual(review_client.photo.url, 'http://testserver/media/%s' % self.img_name)
+        self.assertEqual(review_client.photo.name, self.img_name)
+        review_client.comment = 'eratum'
+        review_client.save()
+        self.assertEqual(review_client.photo.url, 'http://testserver/media/%s' % self.img_name)
+        self.assertEqual(review_client.photo.name, self.img_name)
+        self.assertEqual(review_client.photo.file.read(), image_test)