diff --git a/web_widget_x2many_2d_matrix/README.rst b/web_widget_x2many_2d_matrix/README.rst
index 6be504c4..5fb296be 100644
--- a/web_widget_x2many_2d_matrix/README.rst
+++ b/web_widget_x2many_2d_matrix/README.rst
@@ -49,8 +49,7 @@ show_column_totals
 Known issues / Roadmap
 ======================
 
-* no validation yet
-* it would be better to instantiate the proper field widget and let it render the input
+* it would be worth trying to instantiate the proper field widget and let it render the input
 
 Credits
 =======
diff --git a/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js b/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
index 191ffad6..0c818548 100644
--- a/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
+++ b/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
@@ -209,6 +209,14 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
         // validate a value
         validate_xy_value: function(val)
         {
+            try
+            {
+                this.parse_xy_value(val);
+            }
+            catch(e)
+            {
+                return false;
+            }
             return true;
         },
 
@@ -308,10 +316,12 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
                         val = $this.val()
                     if(self.validate_xy_value(val))
                     {
-                        data = {}
-                        data[self.field_value] = self.parse_xy_value(val);
-                        $this.siblings('span').text(
-                                self.format_xy_value(self.parse_xy_value(val)));
+                        var data = {}, value = self.parse_xy_value(val);
+                        data[self.field_value] = value;
+
+                        $this.siblings('span').text(self.format_xy_value(value));
+                        $this.val(self.format_xy_value(value));
+
                         self.dataset.write($this.data('id'), data);
                         $this.parent().removeClass('oe_form_invalid');
                         self.compute_totals();
@@ -341,6 +351,11 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
             this.$el.find('input').first().focus();
         },
 
+        is_syntax_valid: function()
+        {
+            return this.$el.find('.oe_form_invalid').length == 0;
+        },
+
         // deactivate view related functions
         load_views: function() {},
         reload_current_view: function() {},