diff --git a/src/panels/lovelace/cards/hui-entities-card.ts b/src/panels/lovelace/cards/hui-entities-card.ts
index 445b5b0bb5..696532a881 100644
--- a/src/panels/lovelace/cards/hui-entities-card.ts
+++ b/src/panels/lovelace/cards/hui-entities-card.ts
@@ -109,7 +109,7 @@ class HuiEntitiesCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: EntitiesCardConfig): void {
-    if (!config || !config.entities.length) {
+    if (!config.entities || !Array.isArray(config.entities)) {
       throw new Error("Entities must be specified");
     }