diff --git a/addons/web/static/src/js/chrome.js b/addons/web/static/src/js/chrome.js
index 7af729205be..32a70d587a7 100644
--- a/addons/web/static/src/js/chrome.js
+++ b/addons/web/static/src/js/chrome.js
@@ -1124,8 +1124,11 @@ openerp.web.WebClient = openerp.web.Widget.extend(/** @lends openerp.web.WebClie
         this.$element.children().remove();
     },
     do_reload: function() {
-        return this.session.session_reload().pipe(
-            $.proxy(this.menu, 'do_reload'));
+        var self = this;
+        return this.session.session_reload().pipe(function () {
+            openerp.connection.load_modules(true).pipe(
+                self.menu.proxy('do_reload')); });
+
     },
     do_notify: function() {
         var n = this.notification;
diff --git a/addons/web/static/src/js/core.js b/addons/web/static/src/js/core.js
index 81f13713543..b36e576ae47 100644
--- a/addons/web/static/src/js/core.js
+++ b/addons/web/static/src/js/core.js
@@ -676,27 +676,31 @@ openerp.web.Connection = openerp.web.CallbackEnabled.extend( /** @lends openerp.
     },
     /**
      * Load additional web addons of that instance and init them
+     *
+     * @param {Boolean} [no_session_valid_signal=false] prevents load_module from triggering ``on_session_valid``.
      */
-    load_modules: function() {
+    load_modules: function(no_session_valid_signal) {
         var self = this;
         return this.rpc('/web/session/modules', {}).pipe(function(result) {
-            self.module_list = result;
             var lang = self.user_context.lang;
             var params = { mods: ["web"].concat(result), lang: lang};
-            var modules = self.module_list.join(',');
+            var to_load = _.difference(result, self.module_list).join(',');
+            self.module_list = result;
             return $.when(
-                self.rpc('/web/webclient/csslist', {mods: modules}, self.do_load_css),
-                self.rpc('/web/webclient/qweblist', {mods: modules}).pipe(self.do_load_qweb),
+                self.rpc('/web/webclient/csslist', {mods: to_load}, self.do_load_css),
+                self.rpc('/web/webclient/qweblist', {mods: to_load}).pipe(self.do_load_qweb),
                 self.rpc('/web/webclient/translations', params).pipe(function(trans) {
                     openerp.web._t.database.set_bundle(trans);
                     var file_list = ["/web/static/lib/datejs/globalization/" + lang.replace("_", "-") + ".js"];
-                    return self.rpc('/web/webclient/jslist', {mods: modules}).pipe(function(files) {
+                    return self.rpc('/web/webclient/jslist', {mods: to_load}).pipe(function(files) {
                         return self.do_load_js(file_list.concat(files)); 
                     });
                 })
             ).then(function() {
                 self.on_modules_loaded();
-                self.on_session_valid();
+                if (!no_session_valid_signal) {
+                    self.on_session_valid();
+                }
             });
         });
     },