--- a/src/pyams_content/component/gallery/interfaces/__init__.py	Wed May 30 11:23:41 2018 +0200
+++ b/src/pyams_content/component/gallery/interfaces/__init__.py	Wed May 30 15:13:25 2018 +0200
@@ -44,6 +44,10 @@
 class IGalleryFile(IGalleryItem):
     """Gallery file marker interface"""
 
+    data = MediaField(title=_("Image or video data"),
+                      description=_("Image or video content"),
+                      required=True)
+
     title = I18nTextLineField(title=_("Legend"),
                               required=False)
 
@@ -51,10 +55,6 @@
                                   description=_("Alternate title used to describe media content"),
                                   required=False)
 
-    data = MediaField(title=_("Image or video data"),
-                      description=_("Image or video content"),
-                      required=True)
-
     description = I18nTextField(title=_("Description"),
                                 required=False)