diff --git a/fxjs/cjs_runtime.cpp b/fxjs/cjs_runtime.cpp
index f7d76da..aba2346 100644
--- a/fxjs/cjs_runtime.cpp
+++ b/fxjs/cjs_runtime.cpp
@@ -166,7 +166,7 @@
   return m_pFormFillEnv.Get();
 }
 
-absl::optional<IJS_Runtime::JS_Error> CJS_Runtime::ExecuteScript(
+std::optional<IJS_Runtime::JS_Error> CJS_Runtime::ExecuteScript(
     const WideString& script) {
   return Execute(script);
 }