diff --git a/docs/admin/authentication.md b/docs/admin/authentication.md
index dac3ada7d9ddb..0b263421c919d 100644
--- a/docs/admin/authentication.md
+++ b/docs/admin/authentication.md
@@ -62,7 +62,7 @@ The basic auth file format is implemented in `plugin/pkg/auth/authenticator/pass
 and is a csv file with 3 columns: password, user name, user id.
 
 When using basic authentication from an http client, the apiserver expects an `Authorization` header
-with a value of `Basic BASE64ENCODEDUSER:PASSWORD`.
+with a value of `Basic BASE64ENCODED(USER:PASSWORD)`.
 
 ## Plugin Development