diff --git a/src/Form/Type/SIUnitType.php b/src/Form/Type/SIUnitType.php
index 63010110..608e8fa7 100644
--- a/src/Form/Type/SIUnitType.php
+++ b/src/Form/Type/SIUnitType.php
@@ -57,6 +57,7 @@ class SIUnitType extends AbstractType implements DataMapperInterface
         $resolver->setDefaults([
             'show_prefix' => true,
             'is_integer' => false,
+            'error_mapping' => [ '.' => 'value']
         ]);
 
         $resolver->setRequired('unit');
diff --git a/templates/Form/extendedBootstrap4_layout.html.twig b/templates/Form/extendedBootstrap4_layout.html.twig
index 6a1e6a22..4f70adf0 100644
--- a/templates/Form/extendedBootstrap4_layout.html.twig
+++ b/templates/Form/extendedBootstrap4_layout.html.twig
@@ -43,4 +43,5 @@
             {% endif %}
         </div>
     </div>
+    {{ form_errors(form.value) }}
 {% endblock %}
\ No newline at end of file