diff --git a/src/formio/components/radio.ts b/src/formio/components/radio.ts
index 2eadbef..5cfe308 100644
--- a/src/formio/components/radio.ts
+++ b/src/formio/components/radio.ts
@@ -14,7 +14,6 @@ export type RadioInputSchema = InputComponentSchema<string | null, Validator, Tr
 interface BaseRadioSchema {
   type: 'radio';
   defaultValue: string | null;
-  multiple?: false;
 }
 
 /**