diff --git a/doc/configuration.txt b/doc/configuration.txt
index 949a383..225acb7 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -4349,7 +4349,7 @@
         redirect code 301 prefix / drop-query append-slash if missing_slash
 
   Example: redirect all HTTP traffic to HTTPS when SSL is handled by haproxy.
-        redirect scheme https if !{ is_ssl }
+        redirect scheme https if !{ ssl_fc }
 
   See section 7 about ACL usage.