diff --git a/src/google/protobuf/util/message_differencer_unittest.cc b/src/google/protobuf/util/message_differencer_unittest.cc
index 3be1e3c74e006..03e2874063161 100644
--- a/src/google/protobuf/util/message_differencer_unittest.cc
+++ b/src/google/protobuf/util/message_differencer_unittest.cc
@@ -14,6 +14,7 @@
 #include "google/protobuf/util/message_differencer.h"
 
 #include <algorithm>
+#include <numeric>
 #include <random>
 #include <string>
 #include <vector>