diff --git a/src/ZodSchemaClass.ts b/src/ZodSchemaClass.ts
index d2397c9..3a5d8ba 100644
--- a/src/ZodSchemaClass.ts
+++ b/src/ZodSchemaClass.ts
@@ -24,7 +24,7 @@ export function ZodSchemaClassOf<
     },
 ) {
     const exp = expression
-        .extends(class extends (of as AbstractClass<{}, []>) {
+        .extends(class extends (of as AbstractClass<object, []>) {
             static readonly schema        = schema
             static readonly defaultValues = defaultValues