diff --git a/src/world/Actor/Chara.h b/src/world/Actor/Chara.h
index dab108a6..a5c4de9c 100644
--- a/src/world/Actor/Chara.h
+++ b/src/world/Actor/Chara.h
@@ -9,6 +9,7 @@
 #include <map>
 #include <queue>
 #include <array>
+#include <numeric>
 
 namespace Sapphire::Entity
 {