diff --git a/tryton/gui/window/view_form/model/field.py b/tryton/gui/window/view_form/model/field.py
index 88cfec868c..fa67f9f08d 100644
--- a/tryton/gui/window/view_form/model/field.py
+++ b/tryton/gui/window/view_form/model/field.py
@@ -65,6 +65,7 @@ class CharField(object):
         if modified:
             model.modified = True
             model.modified_fields.setdefault(self.name)
+        self.validate(model)
         return True
 
     def get(self, model, check_load=True, readonly=True, modified=False):
@@ -274,6 +275,7 @@ class M2OField(CharField):
         if modified:
             model.modified = True
             model.modified_fields.setdefault(self.name)
+        self.validate(model)
 
     def set_client(self, model, value, test_state=False, force_change=False):
         internal = model.value[self.name]
@@ -313,6 +315,7 @@ class M2MField(CharField):
         if modified:
             model.modified = True
             model.modified_fields.setdefault(self.name)
+        self.validate(model)
 
     def set_client(self, model, value, test_state=False, force_change=False):
         internal = model.value[self.name]
@@ -392,6 +395,7 @@ class O2MField(CharField):
         model.value[self.name].load(value, display=False)
         #self.internal.signal_connect(self.internal, 'model-changed',
         #       self._model_changed)
+        self.validate(model)
 
     def set_client(self, model, value, test_state=False, force_change=False):
         self.set(model, value, test_state=test_state)
@@ -544,6 +548,7 @@ class ReferenceField(CharField):
         if modified:
             model.modified = True
             model.modified_fields.setdefault(self.name)
+        self.validate(model)
 
 TYPES = {
     'char': CharField,