diff --git a/src/less/day-slot.less b/src/less/day-slot.less
index 1cd5f29ea..997a5c74f 100644
--- a/src/less/day-slot.less
+++ b/src/less/day-slot.less
@@ -23,9 +23,11 @@
 
   .rbc-event-content {
     width: 100%;
-    flex: none;
+    flex: 1 1 0;
     word-wrap: break-word;
     line-height: 1;
+    height: 100%;
+    min-height: 1em;
   }
 
 }