diff --git a/examples/persistent-caching/README.md b/examples/persistent-caching/README.md
index 44191632c..3c1a77825 100644
--- a/examples/persistent-caching/README.md
+++ b/examples/persistent-caching/README.md
@@ -21,6 +21,8 @@ module.exports = (env = "development") => ({
 	},
 	cache: {
 		type: "filesystem",
+		// changing the cacheDirectory is optional,
+		// by default it will be in `node_modules/.cache`
 		cacheDirectory: path.resolve(__dirname, ".cache")
 	}
 });
diff --git a/examples/persistent-caching/webpack.config.js b/examples/persistent-caching/webpack.config.js
index 914e79639..454ef2f51 100644
--- a/examples/persistent-caching/webpack.config.js
+++ b/examples/persistent-caching/webpack.config.js
@@ -6,6 +6,8 @@ module.exports = (env = "development") => ({
 	},
 	cache: {
 		type: "filesystem",
+		// changing the cacheDirectory is optional,
+		// by default it will be in `node_modules/.cache`
 		cacheDirectory: path.resolve(__dirname, ".cache")
 	}
 });