diff --git a/extensions/odoo_theme/static/scss/_mixins.scss b/extensions/odoo_theme/static/scss/_mixins.scss
index 0acb5c24f..630fe125d 100644
--- a/extensions/odoo_theme/static/scss/_mixins.scss
+++ b/extensions/odoo_theme/static/scss/_mixins.scss
@@ -128,7 +128,7 @@
   height: calc(100% - 3rem);
 }
 
-@mixin o-easter-egg($width: 100%, $height: 30px, $img: 'img/poule.svg' ){
+@mixin o-easter-egg($width: 100%, $height: 100%, $img: 'img/poule.svg' ){
     position: relative;
         // Easter Egg on hover 5s
         &:after {