diff --git a/source/ps/KeyName.cpp b/source/ps/KeyName.cpp
index 7abd91841c..1cfa06c15d 100644
--- a/source/ps/KeyName.cpp
+++ b/source/ps/KeyName.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -25,6 +25,7 @@
 #include "ps/CStr.h"
 
 #include <algorithm>
+#include <cstring>
 #include <unordered_map>
 #include <vector>