diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 07c237ae0d8..90335c269df 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -2179,7 +2179,9 @@ instance.web.form.FieldChar = instance.web.form.AbstractField.extend(instance.we
         var self = this;
         var $input = this.$el.find('input');
         $input.change(function() {
-            self.internal_set_value(self.parse_value($input.val()));
+            if(self.is_syntax_valid()){
+                self.internal_set_value(self.parse_value($input.val()));
+            }
         });
         this.setupFocus($input);
     },