diff --git a/reference/configuration.md b/reference/configuration.md
index 15a1d3b..ac28b95 100644
--- a/reference/configuration.md
+++ b/reference/configuration.md
@@ -22,6 +22,29 @@ Pear versioning is automatic. The `package.json` file does **not** require a ver
 
 The name of the application. Overrides `package.json` `name`.
 
+### `pear.builtinsMap` <Object> <small>Terminal Applications Only</small>
+
+Terminal Applications run on the [`bare`](https://github.com/holepunchto/bare) JavaScript runtime,
+which has a very small core so code with expects say, an `fs` module will throw MODULE_NOT_FOUND
+unless that namespace is mapped to an installed module.
+
+Provide an object that maps builtin dependency namespaces to installed modules.
+
+An example `package.json`:
+
+```json
+{
+  "name": "example",
+  "pear": {
+    "builtinsMap": {
+      "fs": "bare-fs"
+    }
+  }
+}
+```
+
+> In future this option may also apply to Desktop Applications.
+
 ### `pear.gui` <Object>
 
 Graphical User Interface configuration options.