diff --git a/docs/content/reference/static-configuration/env-ref.md b/docs/content/reference/static-configuration/env-ref.md
index 786a123ba..b3cc34b1f 100644
--- a/docs/content/reference/static-configuration/env-ref.md
+++ b/docs/content/reference/static-configuration/env-ref.md
@@ -135,10 +135,10 @@ Default certificate resolver for the routers linked to the entry point.
 `TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_DOMAINS`:  
 Default TLS domains for the routers linked to the entry point.
 
-`TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_DOMAINS[n]_MAIN`:  
+`TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_DOMAINS_n_MAIN`:  
 Default subject name.
 
-`TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_DOMAINS[n]_SANS`:  
+`TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_DOMAINS_n_SANS`:  
 Subject alternative names.
 
 `TRAEFIK_ENTRYPOINTS_<NAME>_HTTP_TLS_OPTIONS`:  
diff --git a/internal/gendoc.go b/internal/gendoc.go
index 3e7e51bab..6e6290ec3 100644
--- a/internal/gendoc.go
+++ b/internal/gendoc.go
@@ -64,7 +64,12 @@ THIS FILE MUST NOT BE EDITED BY HAND
 			continue
 		}
 
-		w.writeln("`" + prefix + strings.ReplaceAll(flat.Name, "[0]", "[n]") + "`:  ")
+		if prefix == "" {
+			w.writeln("`" + prefix + strings.ReplaceAll(flat.Name, "[0]", "_n") + "`:  ")
+		} else {
+			w.writeln("`" + prefix + strings.ReplaceAll(flat.Name, "[0]", "[n]") + "`:  ")
+		}
+
 		if flat.Default == "" {
 			w.writeln(flat.Description)
 		} else {