diff --git a/react-packager/src/node-haste/crawlers/watchman.js b/react-packager/src/node-haste/crawlers/watchman.js
index 1b29634f..284fe673 100644
--- a/react-packager/src/node-haste/crawlers/watchman.js
+++ b/react-packager/src/node-haste/crawlers/watchman.js
@@ -70,7 +70,7 @@ function watchmanRecReadDir(roots, {ignore, fileWatcher, exts}) {
 }
 
 function isDescendant(root, child) {
-  return child.startsWith(root);
+  return root === child || child.startsWith(root + path.sep);
 }
 
 module.exports = watchmanRecReadDir;
diff --git a/react-packager/src/node-haste/fastfs.js b/react-packager/src/node-haste/fastfs.js
index 56c6f6a5..ad25c1d5 100644
--- a/react-packager/src/node-haste/fastfs.js
+++ b/react-packager/src/node-haste/fastfs.js
@@ -362,7 +362,7 @@ function makeReadCallback(fd, predicate, callback) {
 }
 
 function isDescendant(root, child) {
-  return child.startsWith(root);
+  return root === child || child.startsWith(root + path.sep);
 }
 
 module.exports = Fastfs;