Accept a subclass of parent as parent?

I made a class in C++ with blueprintable specifier so I could build upon this class.

The C++ class is named Base and the new blueprint is named Item .

I need to set a specific variable of Base reference type to the new Item class that is based on the Base class.

But it won’t show it in the drop down box of in the blueprint.

How can I make the blueprint accept the new Item blueprint as a Base reference?