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 = "");