diff --git a/main.cpp b/main.cpp
index 0080485..b1d2a4e 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,6 +5,7 @@
 
 #include <stdio.h>
 #include <list>
+#include <string>
 #include <iomanip>
 
 void RunTest();