diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index c3c9e6a8c99..12522855303 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -1874,16 +1874,16 @@ openerp.web.form.FieldMany2One = openerp.web.form.Field.extend({
         this.cm_id = _.uniqueId('m2o_cm_');
         this.last_search = [];
         this.tmp_value = undefined;
+    },
+    start: function() {
+        this._super();
+        this.render_content();
         this.on("change:effective_readonly", this, function(origin, event) {
             if (event.oldValue !== event.newValue) {
                 this.render_content();
             }
         });
     },
-    start: function() {
-        this._super();
-        this.render_content();
-    },
     render_content: function() {
         this.$element.html("");
         if (!this.get("effective_readonly"))