--- a/src/pyams_content/component/gallery/file.py	Wed Feb 07 14:44:18 2018 +0100
+++ b/src/pyams_content/component/gallery/file.py	Wed Feb 07 14:44:35 2018 +0100
@@ -67,7 +67,7 @@
     @data.setter
     def data(self, value):
         self._data = value
-        if IImage.providedBy(value):
+        if IImage.providedBy(self._data):
             alsoProvides(self._data, IResponsiveImage)