diff --git a/src/storage/concurrent_id_mapper.hpp b/src/storage/concurrent_id_mapper.hpp
index 5d27b0321..ad6edd0cd 100644
--- a/src/storage/concurrent_id_mapper.hpp
+++ b/src/storage/concurrent_id_mapper.hpp
@@ -17,5 +17,6 @@ class ConcurrentIdMapper {
  public:
   virtual TId value_to_id(const std::string &value) = 0;
   virtual const std::string &id_to_value(const TId &id) = 0;
+  virtual ~ConcurrentIdMapper() {}
 };
 }  // namespace storage
diff --git a/src/storage/concurrent_id_mapper_master.hpp b/src/storage/concurrent_id_mapper_master.hpp
index 388fa98c7..0d0ff241b 100644
--- a/src/storage/concurrent_id_mapper_master.hpp
+++ b/src/storage/concurrent_id_mapper_master.hpp
@@ -11,9 +11,7 @@ namespace storage {
 
 /** Master implementation of ConcurrentIdMapper. */
 template <typename TId>
-class MasterConcurrentIdMapper
-    : public SingleNodeConcurrentIdMapper<TId> {
-
+class MasterConcurrentIdMapper : public SingleNodeConcurrentIdMapper<TId> {
  public:
   MasterConcurrentIdMapper(communication::messaging::System &system);
   ~MasterConcurrentIdMapper();