diff --git a/packages/core/src/utils.js b/packages/core/src/utils.js
index b07c392811..ebfaa89dfe 100644
--- a/packages/core/src/utils.js
+++ b/packages/core/src/utils.js
@@ -540,7 +540,7 @@ export function optionsList(schema) {
   }
 }
 
-function findSchemaDefinition($ref, rootSchema = {}) {
+export function findSchemaDefinition($ref, rootSchema = {}) {
   const origRef = $ref;
   if ($ref.startsWith("#")) {
     // Decode URI fragment representation.