diff --git a/content/momentum/4/lua/ref-msys-validate-openarc-sign.md b/content/momentum/4/lua/ref-msys-validate-openarc-sign.md
index cd9f93db9..b18eb7e6c 100644
--- a/content/momentum/4/lua/ref-msys-validate-openarc-sign.md
+++ b/content/momentum/4/lua/ref-msys-validate-openarc-sign.md
@@ -56,7 +56,7 @@ This function takes the following parameters:
 
     *   `header_canon` – header canonicalization setting.
 
-        Supported values are `relaxed`, `simple`. Defaults to `relaxed`.
+        The only supported value is `relaxed`.
 
     *   `body_canon` – body canonicalization setting