diff --git a/tryton/gui/window/view_form/view/form_gtk/pyson.py b/tryton/gui/window/view_form/view/form_gtk/pyson.py
index 5700e75e7b..ef9150c5f5 100644
--- a/tryton/gui/window/view_form/view/form_gtk/pyson.py
+++ b/tryton/gui/window/view_form/view/form_gtk/pyson.py
@@ -19,7 +19,7 @@ class PYSON(Char):
             return value
         try:
             return self.encoder.encode(eval(value, CONTEXT))
-        except (ValueError, TypeError, NameError, SyntaxError):
+        except Exception:
             return None
 
     def set_value(self, record, field):