Keep in mind that he does not hear too well anymore, so you may have to speak more loudly.
Wiktionary
Keep In Mind Sentence Examples
He should also keep in mind the serenity prayer.
That was something to keep in mind.
It's something to keep in mind.
Well, it's all something to keep in mind.
Also keep in mind that baby care is more expensive than toddler and preschool care because baby centers are allowed to have fewer babies than toddlers or preschoolers, raising the per-child cost.