The England international made his first Premier League start of the season in the 1-1 draw with Norwich City on Sunday following a hamstring injury and Dalglish admits his comeback has given him a nice dilemma at right-back with youngster Martin Kelly also in form.
"It's great to have him (Johnson) back," the Reds boss told the club's official website.
"It's a wee bit unfortunate on Martin Kelly that Glen went in and played, but it just shows you the quality of people we have in the squad and that's what we want.
"Glen certainly did well and it might have been a wee bit of a risk to put him back in as early as that, but he had around 65 minutes at Ibrox (against Rangers ) and that helped him.
"We're delighted to see him back and also have a wee bit of heavy heart for Kells as well."