diff --git a/tokenize.cpp b/tokenize.cpp
index f3087e004..72f45bc76 100644
--- a/tokenize.cpp
+++ b/tokenize.cpp
@@ -29,7 +29,7 @@
 #include <string>
 #include <cstring>
 #include <iostream>
-
+#include <algorithm>
 #include <stdlib.h>     // <- strtoul
 #include <stdio.h>