diff --git a/addons/pad/models/pad.py b/addons/pad/models/pad.py
index dfa1dbf859b..a6a224243b2 100644
--- a/addons/pad/models/pad.py
+++ b/addons/pad/models/pad.py
@@ -116,7 +116,7 @@ class PadCommon(models.AbstractModel):
     # Set the pad content in vals
     def _set_pad_value(self, vals):
         for k, v in vals.items():
-            field = self._fields[k]
+            field = self._fields.get(k)
             if hasattr(field, 'pad_content_field'):
                 vals[field.pad_content_field] = self.pad_get_content(v)