diff --git a/addons/web/static/src/js/chrome.js b/addons/web/static/src/js/chrome.js
index 54d26c5ec5b..5c7eb8524e6 100644
--- a/addons/web/static/src/js/chrome.js
+++ b/addons/web/static/src/js/chrome.js
@@ -129,13 +129,10 @@ instance.web.Dialog = instance.web.Widget.extend({
         if (! this.dialog_inited)
             this.init_dialog();
         var o = this.get_options(options);
-        if (! this.params_buttons) {
-            this.$buttons.appendTo($("body"));
-        }
+        this.$buttons.appendTo($("body"));
         instance.web.dialog(this.$el, o).dialog('open');
-        if (! this.params_buttons) {
-            this.$buttons.appendTo(this.$el.dialog("widget"));
-        }
+        this.$el.dialog("widget").find(".ui-dialog-buttonpane").remove();
+        this.$buttons.appendTo(this.$el.dialog("widget"));
         if (o.height === 'auto' && o.max_height) {
             this.$el.css({ 'max-height': o.max_height, 'overflow-y': 'auto' });
         }
@@ -148,6 +145,8 @@ instance.web.Dialog = instance.web.Widget.extend({
         if (! this.params_buttons) {
             this.$buttons = $('<div class="ui-dialog-buttonpane ui-widget-content ui-helper-clearfix" />');
             this.$el.dialog("widget").append(this.$buttons);
+        } else {
+            this.$buttons = this.$el.dialog("widget").find(".ui-dialog-buttonpane");
         }
         this.dialog_inited = true;
         var res = this.start();