diff --git a/src/universal/README.md b/src/universal/README.md
index 8bc2c1e19..c069f3592 100644
--- a/src/universal/README.md
+++ b/src/universal/README.md
@@ -53,6 +53,19 @@ Alternatively, you can use the contents of [.devcontainer](.devcontainer) to ful
 
 Refer to [this guide](https://containers.dev/guide/dockerfile) for more details.
 
+## Disabling Automatic Setup in Codespaces
+
+Codespaces will automatically perform some default setup when the `universal` image is used and no `postCreateCommand` is provided. This can be disabled with the `customizations.codespaces.disableAutomaticConfiguration` setting:
+
+```jsonc
+"customizations": {
+	// Configure properties specific to Codespaces.
+	"codespaces": {
+		"disableAutomaticConfiguration": true
+	}
+}
+```
+
 ## License
 
 Copyright (c) Microsoft Corporation. All rights reserved.