diff --git a/Exception.h b/Exception.h
index 8692a2a..10f3f79 100644
--- a/Exception.h
+++ b/Exception.h
@@ -277,6 +277,8 @@ namespace Alepha::Hydrogen  ::detail::  exceptions
 
 				~Violation() override { if( not active ) abort(); }
 
+				Violation()= default;
+
 				Violation( const Violation &copy )= delete;
 				Violation( Violation &copy ) : active( copy.active ) { copy.active= false; }
 		};