From 60c360d1b1535dc727a174c2a046b42b4dec3fdb Mon Sep 17 00:00:00 2001
From: Bela Schaum <schaumb@gmail.com>
Date: Fri, 6 Dec 2024 17:38:27 +0100
Subject: [PATCH] clang-tidy

---
 src/base/alg/union_foreach.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/base/alg/union_foreach.h b/src/base/alg/union_foreach.h
index 375b9e036..dbb444e5c 100644
--- a/src/base/alg/union_foreach.h
+++ b/src/base/alg/union_foreach.h
@@ -1,6 +1,7 @@
 #ifndef ALG_UNION_FOREACH_H
 #define ALG_UNION_FOREACH_H
 
+#include <functional>
 #include <ranges>
 
 #include "union_foreach.h"