diff --git a/aos/json_tokenizer.cc b/aos/json_tokenizer.cc
index 47fcdbe..9bb457c 100644
--- a/aos/json_tokenizer.cc
+++ b/aos/json_tokenizer.cc
@@ -1,6 +1,7 @@
 #include "aos/json_tokenizer.h"
 
 #include <cerrno>
+#include <limits>
 
 namespace aos {