diff --git a/packages/workflow/src/safe-regex.ts b/packages/workflow/src/safe-regex.ts
index a94cd729757..dbe5562647a 100644
--- a/packages/workflow/src/safe-regex.ts
+++ b/packages/workflow/src/safe-regex.ts
@@ -212,7 +212,7 @@ export function setUserRegexEngine(regexEngine: RegexEngine): void {
 }
 
 export function resetUserRegexEngine(): void {
-	userEngine = createDefaultEngine();
+	userEngine = undefined;
 }
 
 function getUserEngine(): RegexEngine {