diff --git a/src/name-assignments/assignment-funcs.hpp b/src/name-assignments/assignment-funcs.hpp
index 30408b5..42a34ed 100644
--- a/src/name-assignments/assignment-funcs.hpp
+++ b/src/name-assignments/assignment-funcs.hpp
@@ -26,7 +26,8 @@
 namespace ndn {
 namespace ndncert {
 
-class NameAssignmentFunc : noncopyable {
+class NameAssignmentFunc : noncopyable
+{
 public:
   explicit NameAssignmentFunc(const std::string& factoryType, const std::string& format = "");
 
diff --git a/src/name-assignments/assignment-hash.hpp b/src/name-assignments/assignment-hash.hpp
index b0cf417..a8ca6a6 100644
--- a/src/name-assignments/assignment-hash.hpp
+++ b/src/name-assignments/assignment-hash.hpp
@@ -29,7 +29,8 @@
 /**
  * assign names base on client probe parameter
  */
-class AssignmentHash: public NameAssignmentFunc {
+class AssignmentHash: public NameAssignmentFunc
+{
 public:
   AssignmentHash(const std::string& format = "");
 
diff --git a/src/name-assignments/assignment-random.hpp b/src/name-assignments/assignment-random.hpp
index a3e30dd..d145fc7 100644
--- a/src/name-assignments/assignment-random.hpp
+++ b/src/name-assignments/assignment-random.hpp
@@ -29,7 +29,8 @@
 /**
  * assign names base on client probe parameter
  */
-class AssignmentRandom: public NameAssignmentFunc {
+class AssignmentRandom: public NameAssignmentFunc
+{
 public:
   AssignmentRandom(const std::string& format = "");
 
@@ -37,9 +38,7 @@
   assignName(const std::vector<std::tuple<std::string, std::string>>& params) override;
 };
 
-}
-}
-
-
+} // namespace ndncert
+} // namespace ndn
 
 #endif //NDNCERT_ASSIGNMENT_RANDOM_HPP