diff --git a/cpp/build-packages.cpp b/cpp/build-packages.cpp
index 11ce65b..fb6eb31 100644
--- a/cpp/build-packages.cpp
+++ b/cpp/build-packages.cpp
@@ -35,6 +35,7 @@
 #include <iterator>
 #include <yaml-cpp/yaml.h>
 #include <ctime>
+#include <numeric>
 
 #include <git2.h>