diff --git a/src/state-summary/state-card-number.js b/src/state-summary/state-card-number.js
index 3a701d8eae..be4349be64 100644
--- a/src/state-summary/state-card-number.js
+++ b/src/state-summary/state-card-number.js
@@ -30,7 +30,7 @@ class StateCardNumber extends mixinBehaviors(
         .sliderstate {
           min-width: 45px;
         }
-        ha-slider[hidden] {
+        [hidden] {
           display: none !important;
         }
         ha-textfield {