diff --git a/src/name-assignment/assignment-hash.hpp b/src/name-assignment/assignment-hash.hpp
index 941ce5a..77e5e91 100644
--- a/src/name-assignment/assignment-hash.hpp
+++ b/src/name-assignment/assignment-hash.hpp
@@ -29,7 +29,7 @@
 /**
  * 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-assignment/assignment-param.hpp b/src/name-assignment/assignment-param.hpp
index dc45e03..bc1a084 100644
--- a/src/name-assignment/assignment-param.hpp
+++ b/src/name-assignment/assignment-param.hpp
@@ -29,7 +29,8 @@
 /**
  * assign names base on client probe parameter
  */
-class AssignmentParam: public NameAssignmentFunc{
+class AssignmentParam : public NameAssignmentFunc
+{
 public:
   AssignmentParam(const std::string& format = "");
 
diff --git a/src/name-assignment/assignment-random.hpp b/src/name-assignment/assignment-random.hpp
index 93e288d..cf6509f 100644
--- a/src/name-assignment/assignment-random.hpp
+++ b/src/name-assignment/assignment-random.hpp
@@ -29,7 +29,7 @@
 /**
  * assign names base on client probe parameter
  */
-class AssignmentRandom: public NameAssignmentFunc
+class AssignmentRandom : public NameAssignmentFunc
 {
 public:
   AssignmentRandom(const std::string& format = "");