diff --git a/crypto/arc4.cpp b/crypto/arc4.cpp
index adaa8bd7..792a0e16 100644
--- a/crypto/arc4.cpp
+++ b/crypto/arc4.cpp
@@ -17,6 +17,7 @@
 #include "arc4.hpp"
 
 #include <algorithm>
+#include <numeric>
 
 using util::crypto::ARC4;