diff --git a/packages/env/lib/config.js b/packages/env/lib/config.js
index c7b0d4d5e4264..1ed403b41e5ed 100644
--- a/packages/env/lib/config.js
+++ b/packages/env/lib/config.js
@@ -38,7 +38,7 @@ const HOME_PATH_PREFIX = `~${ path.sep }`;
  * @property {number}      port                    The port on which to start the development WordPress environment.
  * @property {number}      testsPort               The port on which to start the testing WordPress environment.
  * @property {Object}      config                  Mapping of wp-config.php constants to their desired values.
- * @property {Object.<string, Source>} mappings    Mapping of WordPress directories to local directories which should be mounted.
+ * @property {Object.<string, WPSource>} mappings    Mapping of WordPress directories to local directories which should be mounted.
  * @property {boolean}     debug                   True if debug mode is enabled.
  */