diff --git a/svf_jtag.hpp b/svf_jtag.hpp
index ad20503..22bef2f 100644
--- a/svf_jtag.hpp
+++ b/svf_jtag.hpp
@@ -1,5 +1,8 @@
+#ifndef SVF_JTAG_HPP
+#define SVF_JTAG_HPP
 #include <iostream>
 #include <vector>
+#include <map>
 using namespace std;
 
 class SVF_jtag {
@@ -58,3 +61,4 @@ class SVF_jtag {
 	svf_XYR tdr;
 	svf_XYR tir;
 };
+#endif