diff --git a/packages/react-native/scripts/compose-source-maps.js b/packages/react-native/scripts/compose-source-maps.js
index be908e97755..db9ae1aa5ed 100755
--- a/packages/react-native/scripts/compose-source-maps.js
+++ b/packages/react-native/scripts/compose-source-maps.js
@@ -61,6 +61,6 @@ if (!argv.length) {
   if (outputPath) {
     fs.writeFileSync(outputPath, composedMapJSON, 'utf8');
   } else {
-    process.stdout.write();
+    process.stdout.write(composedMapJSON);
   }
 }