diff --git a/src/identity-challenge/challenge-pin.cpp b/src/identity-challenge/challenge-pin.cpp
index 8886b67..cd2c03e 100644
--- a/src/identity-challenge/challenge-pin.cpp
+++ b/src/identity-challenge/challenge-pin.cpp
@@ -124,5 +124,5 @@
   request.encode();
   return request;
 }
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn