commons clean up

Change-Id: I13ce15666974e294d2645768dd20194f0584d406
diff --git a/src/ca-state.hpp b/src/ca-state.hpp
index fefc0ff..4c99185 100644
--- a/src/ca-state.hpp
+++ b/src/ca-state.hpp
@@ -21,7 +21,7 @@
 #ifndef NDNCERT_CA_STATE_HPP
 #define NDNCERT_CA_STATE_HPP
 
-#include "ndncert-common.hpp"
+#include "protocol-detail/ndncert-common.hpp"
 
 namespace ndn {
 namespace ndncert {