minor

Change-Id: I5116d6f2a8c757f0ee4740667a3eca1e0b2795a2
diff --git a/src/detail/probe-encoder.hpp b/src/detail/probe-encoder.hpp
index f75e892..2e47e76 100644
--- a/src/detail/probe-encoder.hpp
+++ b/src/detail/probe-encoder.hpp
@@ -21,7 +21,7 @@
 #ifndef NDNCERT_DETAIL_PROBE_ENCODER_HPP
 #define NDNCERT_DETAIL_PROBE_ENCODER_HPP
 
-#include "configuration.hpp"
+#include "detail/ndncert-common.hpp"
 
 namespace ndn {
 namespace ndncert {