diff --git a/third_party/ijar/mapped_file_unix.cc b/third_party/ijar/mapped_file_unix.cc
index 6e3a90871844..65179e3290ec 100644
--- a/third_party/ijar/mapped_file_unix.cc
+++ b/third_party/ijar/mapped_file_unix.cc
@@ -15,10 +15,11 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
-#include <unistd.h>
 #include <sys/mman.h>
+#include <unistd.h>
 
 #include <algorithm>
+#include <limits>
 
 #include "third_party/ijar/mapped_file.h"