From e180d7720e5159162c9fb4c00abf266d1ee62388 Mon Sep 17 00:00:00 2001
From: LJ Sonic <lamr@free.fr>
Date: Tue, 29 Jul 2025 23:30:18 +0200
Subject: [PATCH] Add missing include directive

---
 src/matrix.c     | 2 ++
 src/quaternion.c | 2 ++
 src/vector3d.c   | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/src/matrix.c b/src/matrix.c
index f950df36e..8c8126db9 100644
--- a/src/matrix.c
+++ b/src/matrix.c
@@ -9,6 +9,8 @@
 /// \file  matrix.c
 /// \brief Fixed-point 3D vector
 
+#include <string.h>
+
 #include "matrix.h"
 
 static matrix_t identitymatrix = {{
diff --git a/src/quaternion.c b/src/quaternion.c
index e566546b6..d5ee27eb2 100644
--- a/src/quaternion.c
+++ b/src/quaternion.c
@@ -9,6 +9,8 @@
 /// \file  quaternion.c
 /// \brief Fixed-point 3D vector
 
+#include <string.h>
+
 #include "quaternion.h"
 #include "vector3d.h"
 #include "matrix.h"
diff --git a/src/vector3d.c b/src/vector3d.c
index abf4e95b8..3e842409b 100644
--- a/src/vector3d.c
+++ b/src/vector3d.c
@@ -9,6 +9,8 @@
 /// \file  vector3d.c
 /// \brief Fixed-point 3D vector
 
+#include <string.h>
+
 #include "vector3d.h"
 #include "r_main.h" // R_PointToDist2