diff --git a/src/panels/lovelace/cards/hui-horizontal-stack-card.ts b/src/panels/lovelace/cards/hui-horizontal-stack-card.ts
index 4e41f9a5c071..aec415dd26f0 100644
--- a/src/panels/lovelace/cards/hui-horizontal-stack-card.ts
+++ b/src/panels/lovelace/cards/hui-horizontal-stack-card.ts
@@ -28,6 +28,7 @@ export class HuiHorizontalStackCard extends HuiStackCard {
       css`
         #root {
           display: flex;
+          height: 100%;
           gap: var(--horizontal-stack-card-gap, var(--stack-card-gap, 8px));
         }
         #root > hui-card {