Mark Warburton has already brought veteran Clint Hill to Ibrox this summer.
Rangers' manager Mark Warburton (L) and assistant manager David Weir
Rangers are making their return to the Scottish Premiership next season after securing the Championship title last season.
QPR's Clint Hill
There is big expectation upon their shoulders, with Gers fans hoping they can immediately challenge Celtic for the title after their four-year absence in the lower leagues.
To do so they will need to improve upon a small squad, with it believed that Mark Warburton is keen to build a big squad at Ibrox this summer.
One of the areas he may look to improve is the defence and Stein believes that they definitely need to add experience to the back line.
“We definitely need experience at the back, getting Hill from QPR and possibly trying to sign someone else,” he told rangers.co.uk.
“We’ve struggled to defend aerial balls; crosses and corners, and a physical presence is needed.”
Burnley's Joey Barton
It will certainly be interesting to see if Rangers looks to add more experience to their defence this summer.
A report from the Daily Record this week revealed that they were in negotiations with free agent Adrian Mariappa, who would certainly fit the bill if Warburton wants to add more experience to the back line.
With Joey Barton also signed for the defensive midfield role, it appears the Gers boss agrees with Stein’s assessment of their needs.
Rangers manager Mark Warburton celebrates at the end of the match