diff --git a/lib/History.h b/lib/History.h
index 3ce702f3..169e6af6 100644
--- a/lib/History.h
+++ b/lib/History.h
@@ -322,7 +322,7 @@ class CompactHistoryBlock
 
 class CompactHistoryBlockList {
 public:
-  CompactHistoryBlockList() {};
+   CompactHistoryBlockList() = default;
   ~CompactHistoryBlockList();
 
   void *allocate( size_t size );