diff --git a/addons/web/static/src/scss/web_calendar.scss b/addons/web/static/src/scss/web_calendar.scss
index f12fc40726c..9c429491cd7 100644
--- a/addons/web/static/src/scss/web_calendar.scss
+++ b/addons/web/static/src/scss/web_calendar.scss
@@ -687,6 +687,8 @@ $o-cw-filter-avatar-size: 20px;
     .o_cw_popover_fields_secondary {
         max-height: 170px; // Fallback for old browsers
         max-height: 25vh;
+        overflow: auto;
+        padding-bottom: 1px; // prevents the scrollbar to show when not needed
 
         &::-webkit-scrollbar {
             background: gray('200');