diff --git a/src/db/ModelRelation.ts b/src/db/ModelRelation.ts
index 13f7684..c45d850 100644
--- a/src/db/ModelRelation.ts
+++ b/src/db/ModelRelation.ts
@@ -39,7 +39,7 @@ export default abstract class ModelRelation<S extends Model, O extends Model, R
     }
 
     public getOrFail(): R {
-        if (!this.cachedModels) throw new Error('Models were not fetched');
+        if (this.cachedModels === undefined) throw new Error('Models were not fetched');
         return this.cachedModels;
     }