diff --git a/docs/k8s/README.md b/docs/k8s/README.md
index cd355e2d0..eb933d1c0 100644
--- a/docs/k8s/README.md
+++ b/docs/k8s/README.md
@@ -16,7 +16,7 @@ There are quite a few ways of running Tailscale inside a Kubernetes Cluster, som
    metadata:
      name: tailscale-auth
    stringData:
-     TS_AUTH_KEY: tskey-...
+     AUTH_KEY: tskey-...
    ```
 
 1. Tailscale (v1.16+) supports storing state inside a Kubernetes Secret.