diff --git a/src/token.h b/src/token.h
index cf7c0fe..bf4f922 100644
--- a/src/token.h
+++ b/src/token.h
@@ -5,7 +5,7 @@
 
 
 #include "mark.h"
-#include <ios>
+#include <iostream>
 #include <string>
 #include <vector>