diff --git a/tools/lint-md/lint-md.mjs b/tools/lint-md/lint-md.mjs
index f623be28130edf..507a25070d9070 100644
--- a/tools/lint-md/lint-md.mjs
+++ b/tools/lint-md/lint-md.mjs
@@ -29178,7 +29178,7 @@ paths.forEach(async (path) => {
   const file = await read(path);
   const result = await linter.process(file);
   if (format) {
-    fs.writeFileSync(path, String(result));
+    fs.writeFileSync(path, result.toString());
   } else if (result.messages.length) {
     process.exitCode = 1;
     console.error(reporter(result));
diff --git a/tools/lint-md/lint-md.src.mjs b/tools/lint-md/lint-md.src.mjs
index ed32f7e1afb1cf..e990b5317248d6 100644
--- a/tools/lint-md/lint-md.src.mjs
+++ b/tools/lint-md/lint-md.src.mjs
@@ -32,7 +32,7 @@ paths.forEach(async (path) => {
   const file = await read(path);
   const result = await linter.process(file);
   if (format) {
-    fs.writeFileSync(path, String(result));
+    fs.writeFileSync(path, result.toString());
   } else if (result.messages.length) {
     process.exitCode = 1;
     console.error(reporter(result));