diff --git a/packages/metro-bundler/src/node-haste/DependencyGraph/ResolutionRequest.js b/packages/metro-bundler/src/node-haste/DependencyGraph/ResolutionRequest.js
index dfe0e6f2..4196c378 100644
--- a/packages/metro-bundler/src/node-haste/DependencyGraph/ResolutionRequest.js
+++ b/packages/metro-bundler/src/node-haste/DependencyGraph/ResolutionRequest.js
@@ -296,6 +296,12 @@ class ResolutionRequest<TModule: Moduleish, TPackage: Packageish> {
       return result;
     }
 
+    function resolveKeyWithPromise(
+      [key: TModule, promise: Promise<Array<TModule>>],
+    ): Promise<[TModule, Array<TModule>]> {
+      return promise.then(value => [key, value]);
+    }
+
     return Promise.all([
       // kicks off recursive dependency discovery, but doesn't block until it's
       // done
@@ -901,10 +907,6 @@ function resolveWindowsPath(modulePath) {
   return path.resolve(modulePath);
 }
 
-function resolveKeyWithPromise([key, promise]) {
-  return promise.then(value => [key, value]);
-}
-
 function isRelativeImport(filePath) {
   return /^[.][.]?(?:[/]|$)/.test(filePath);
 }