diff --git a/src/document/views.py b/src/document/views.py
index 86e53f1f7643a134731c18c3c52b891d2de4d581..4a2f53cd68544718e47767f665d9fa6091acc342 100644
--- a/src/document/views.py
+++ b/src/document/views.py
@@ -57,7 +57,7 @@ class DocumentViewSet(viewsets.ModelViewSet):
         with document.file.open() as fh:
             response = HttpResponse(
                 fh.read(),
-                content_type=mimetypes.guess_type(document.file.name)
+                content_type=mimetypes.guess_type(document.file.name)[0]
             )
             response['Content-Disposition'] = \
                 'inline; filename=' + os.path.basename(document.file.name)