diff --git a/web/src/components/Meditor/types.ts b/web/src/components/Meditor/types.ts
index c6b0a7fae..5ca93b13f 100644
--- a/web/src/components/Meditor/types.ts
+++ b/web/src/components/Meditor/types.ts
@@ -65,7 +65,7 @@ export const isJSONSchema = (schema: JSONSchemaUnionType): schema is JSONSchema7
 
 export const isBasicSchema = (schema: JSONSchemaUnionType): schema is BasicSchema => (
   isJSONSchema(schema)
-  && isBasicType(schema.type)
+  && (isBasicType(schema.type) || schema.type === undefined)
 );
 
 export const isObjectSchema = (schema: JSONSchemaUnionType): schema is ObjectSchema => (