diff --git a/src/client/components/forms/field-types/RadioGroup/index.js b/src/client/components/forms/field-types/RadioGroup/index.js
index 2efe7f2885..8e1b68f0f8 100644
--- a/src/client/components/forms/field-types/RadioGroup/index.js
+++ b/src/client/components/forms/field-types/RadioGroup/index.js
@@ -31,9 +31,9 @@ const RadioGroup = (props) => {
   const path = pathFromProps || name;
 
   const memoizedValidate = useCallback((value) => {
-    const validationResult = validate(value, { required });
+    const validationResult = validate(value, { required, options });
     return validationResult;
-  }, [validate, required]);
+  }, [validate, required, options]);
 
   const {
     value,
diff --git a/src/fields/validations.js b/src/fields/validations.js
index 08d79fac5e..a0d043952b 100644
--- a/src/fields/validations.js
+++ b/src/fields/validations.js
@@ -157,7 +157,7 @@ const optionsToValidatorMap = {
     return defaultMessage;
   },
   radio: (value, options = {}) => {
-    if (value || !options.required) return true;
+    if ((value || !options.required) && (options.options.find((option) => option.value === value))) return true;
     return defaultMessage;
   },
   blocks: (value, options) => {