diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
index 0811675b000..adf92f5b124 100644
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ b/packages/react-scripts/config/webpack.config.dev.js
@@ -88,7 +88,7 @@ module.exports = {
     // https://github.com/facebookincubator/create-react-app/issues/253
     modules: ['node_modules', paths.appNodeModules].concat(
       // It is guaranteed to exist because we tweak it in `env.js`
-      process.env.NODE_PATH.split(path.delimiter)
+      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
     ),
     // These are the reasonable defaults supported by the Node ecosystem.
     // We also include JSX as a common component filename extension to support
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index 49c62af1d79..3de2775e030 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -86,7 +86,7 @@ module.exports = {
     // https://github.com/facebookincubator/create-react-app/issues/253
     modules: ['node_modules', paths.appNodeModules].concat(
       // It is guaranteed to exist because we tweak it in `env.js`
-      process.env.NODE_PATH.split(path.delimiter)
+      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
     ),
     // These are the reasonable defaults supported by the Node ecosystem.
     // We also include JSX as a common component filename extension to support