diff --git a/addons/event/static/src/css/event.css b/addons/event/static/src/css/event.css
index 8602ea24d53..dd6cc21ffc9 100644
--- a/addons/event/static/src/css/event.css
+++ b/addons/event/static/src/css/event.css
@@ -19,6 +19,7 @@
   color: #8A89BA;
   -webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
   background-color: #FFFFFF;
+  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);  
 }
 .oe_event_month_year{
   border-bottom-left-radius:3px;