diff --git a/src/security/sec-public-info-memory.hpp b/src/security/sec-public-info-memory.hpp
index 0c6b70f..20ccde6 100644
--- a/src/security/sec-public-info-memory.hpp
+++ b/src/security/sec-public-info-memory.hpp
@@ -18,6 +18,8 @@
 #include "../common.hpp"
 #include "sec-public-info.hpp"
 
+#include <map>
+
 namespace ndn {
 
 /**