diff --git a/packages/out-of-tree-platforms/src/index.flow.js b/packages/out-of-tree-platforms/src/index.flow.js
new file mode 100644
index 00000000000000..2244b1ce77d29e
--- /dev/null
+++ b/packages/out-of-tree-platforms/src/index.flow.js
@@ -0,0 +1,5 @@
+if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
+  require('../../../scripts/build/babel-register').registerForMonorepo();
+}
+
+export * from './getPlatformResolver';