diff --git a/src/exclude.hpp b/src/exclude.hpp
index 2fa939f..d187a1a 100644
--- a/src/exclude.hpp
+++ b/src/exclude.hpp
@@ -17,6 +17,8 @@
 
 #include "name-component.hpp"
 
+#include <map>
+
 namespace ndn {
 
 /**