diff --git a/src/login/logind-varlink.c b/src/login/logind-varlink.c
index a1fdac01c9..ae2e32d3fa 100644
--- a/src/login/logind-varlink.c
+++ b/src/login/logind-varlink.c
@@ -308,7 +308,7 @@ static int vl_method_release_session(sd_varlink *link, sd_json_variant *paramete
         } p;
 
         static const sd_json_dispatch_field dispatch_table[] = {
-                { "Id", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, voffsetof(p, id), SD_JSON_MANDATORY },
+                { "Id", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, voffsetof(p, id), 0 },
                 {}
         };