diff --git a/src/main/antora/modules/ROOT/pages/auditing.adoc b/src/main/antora/modules/ROOT/pages/auditing.adoc
index 4acf4b901..1939c3b8b 100644
--- a/src/main/antora/modules/ROOT/pages/auditing.adoc
+++ b/src/main/antora/modules/ROOT/pages/auditing.adoc
@@ -109,10 +109,9 @@ class SpringSecurityAuditorAware implements ReactiveAuditorAware<User> {
   public Mono<User> getCurrentAuditor() {
 
     return ReactiveSecurityContextHolder.getContext()
-                .filter(it -> it.getAuthentication() != null)
-                .map(SecurityContext::getAuthentication)
+                .mapNotNull(SecurityContext::getAuthentication)
                 .filter(Authentication::isAuthenticated)
-                .map(Authentication::getPrincipal)
+                .mapNotNull(Authentication::getPrincipal)
                 .map(User.class::cast);
   }
 }