diff --git a/src/name-assignment/assignment-func.hpp b/src/name-assignment/assignment-func.hpp
index a936bac..81fc58a 100644
--- a/src/name-assignment/assignment-func.hpp
+++ b/src/name-assignment/assignment-func.hpp
@@ -21,7 +21,7 @@
 #ifndef NDNCERT_ASSIGNMENT_FUNCS_HPP
 #define NDNCERT_ASSIGNMENT_FUNCS_HPP
 
-#include "../detail/ca-state.hpp"
+#include "detail/ca-state.hpp"
 
 namespace ndn {
 namespace ndncert {