Howe feels he again merits continued international recognition.
"It (England call-up) is deserved. I think he has had a good start to the season," Howe said.
"I think with Callum we have just been focusing on his performances and making sure he delivers what we need for the team.
"On the back of that, we have always said we feel he will score goals if he gets the finer points of his performance right.
"I think he has and now he is in a confident mood - that is a great sign for us and for him."