diff --git a/src/features/schedule/components/ScheduleFilter.scss b/src/features/schedule/components/ScheduleFilter.scss
index 608a1025..872c6410 100644
--- a/src/features/schedule/components/ScheduleFilter.scss
+++ b/src/features/schedule/components/ScheduleFilter.scss
@@ -20,6 +20,16 @@
     gap: vars.$space-l;
   }
 
+  .validation-tooltip {
+    background-color: colors.$red;
+    color: colors.$white;
+    padding: vars.$space-s vars.$space-m;
+    border-radius: vars.$border-radius;
+    font-size: fonts.$font-size-s;
+    margin-top: calc(vars.$space-l * -1);
+    position: relative;
+  }
+
   .label--filter {
     display: block;
     font-size: 12px;