diff --git a/SilentPatchIII/ModelInfoIII.h b/SilentPatchIII/ModelInfoIII.h
index ab1a00d..256a6be 100644
--- a/SilentPatchIII/ModelInfoIII.h
+++ b/SilentPatchIII/ModelInfoIII.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint>
+#include <functional>
 #include "Maths.h"
 
 #include <rwcore.h>