diff --git a/net-mgmt/simplomon/files/patch-notifiers.hh b/net-mgmt/simplomon/files/patch-notifiers.hh
new file mode 100644
index 000000000000..4843ca780b38
--- /dev/null
+++ b/net-mgmt/simplomon/files/patch-notifiers.hh
@@ -0,0 +1,8 @@
+--- notifiers.hh.orig	2026-05-09 08:36:59 UTC
++++ notifiers.hh
+@@ -1,4 +1,5 @@
+ #pragma once
++#include <type_traits>
+ #include <string>
+ #include "sol/sol.hpp"
+ #include "sclasses.hh"