build fix, relative path

Change-Id: I976a3dec39669a308596acbfc2366c402ee0fb05
diff --git a/src/algo/encryptor.hpp b/src/algo/encryptor.hpp
index ceda667..04556b9 100644
--- a/src/algo/encryptor.hpp
+++ b/src/algo/encryptor.hpp
@@ -21,7 +21,7 @@
 #define NDN_ENCRYPTOR_HPP
 
 #include <ndn-cxx/data.hpp>
-#include "algo/encrypt-params.hpp"
+#include "encrypt-params.hpp"
 
 namespace ndn {
 namespace gep {