diff --git a/docs/installation-guides/install-codex.md b/docs/installation-guides/install-codex.md
index 5f92996bc..af2444588 100644
--- a/docs/installation-guides/install-codex.md
+++ b/docs/installation-guides/install-codex.md
@@ -20,10 +20,12 @@ bearer_token_env_var = "GITHUB_PAT_TOKEN"
 
 You can also add it via the Codex CLI:
 
-```cli
-codex mcp add github --url https://api.githubcopilot.com/mcp/  
+```bash
+codex mcp add github --url https://api.githubcopilot.com/mcp/ --bearer-token-env-var GITHUB_PAT_TOKEN
 ```
 
+The `--bearer-token-env-var` option is required for PAT-authenticated access to the hosted GitHub MCP server.
+
 <details>
 <summary><b>Storing Your PAT Securely</b></summary>
 <br>