diff --git a/addons/mail/static/src/js/composers/basic_composer.js b/addons/mail/static/src/js/composers/basic_composer.js
index eef11bbab33..6a18cb68741 100644
--- a/addons/mail/static/src/js/composers/basic_composer.js
+++ b/addons/mail/static/src/js/composers/basic_composer.js
@@ -685,6 +685,7 @@ var BasicComposer = Widget.extend({
      * @param {Event} ev
      */
     _onEmojiImageClick: function (ev) {
+        ev.preventDefault();
         var cursorPosition = this.getSelectionPositions();
         var inputVal = this.$input.val();
         var leftSubstring = inputVal.substring(0, cursorPosition.start);