diff --git a/src/base/hash.h b/src/base/hash.h
index 0cd3bb5976..ed07d74b31 100644
--- a/src/base/hash.h
+++ b/src/base/hash.h
@@ -26,6 +26,7 @@ using namespace __gnu_cxx;  // NOLINT
 #include <hash_set>
 #endif
 
+#include <array>
 #include <string>
 #include <utility>