diff --git a/include/omath/containers/encrypted_variable.hpp b/include/omath/containers/encrypted_variable.hpp
index c1ba8f4..3d1c250 100644
--- a/include/omath/containers/encrypted_variable.hpp
+++ b/include/omath/containers/encrypted_variable.hpp
@@ -178,7 +178,7 @@ namespace omath
     };
 
     template<class EncryptedVarType>
-    class VarAnchor
+    class VarAnchor final
     {
     public:
         // ReSharper disable once CppNonExplicitConvertingConstructor