Bernardo Silva had the host ahead in the first half but Habib Habibou netted the equaliser with just three minutes remaining.
The result leaves Leonardo Jardim's side six points behind leader Paris Saint-Germain with just five games to play as the club from the capital, which also has a game in hand, beat Nice 3-1.
Javier Pastore scored twice and Edinson Cavani's penalty rounded off a comfortable win, Mathieu Bodmer steering home Nice's goal.
At the other end of the table, Toulouse was the big mover as all of the bottom seven were all in action.
Martin Braithwaite scored the only goal as Le Tefece won 1-0 at fellow struggler Lorient despite the late dismissal of Francois Moubandje.
The win vaulted Dominique Arribage's side above its opponent as well as both Evian and Bastia, up to 15th place in the table and three points outside the relegation zone.
Bastia was beaten 2-1 at home by Reims, which also kept itself above the safety line on the same points total as Toulouse.
David Ngog and Aissa Mandi scored Reims's goals before half-time and Bastia was unable to add to Giovanni Sio's 48th-minute response.
Evian was held 1-1 at Guingamp and lies one place and two points above the final relegation spot, occupied by Lorient.
Claudio Beauvue gave Guingamp the lead on the stroke of half-time but Nicolas Blandi equalised early in the second period.
Metz won the battle of the bottom two, 3-1 against Lens.
Florent Malouda's first-half goal, Bouna Sarr's penalty and Modibo Maiga's clincher meant Aristote Madiani's reply counted for little.
Even with the win Metz remains eight points adrift of safety, with rock-bottom Lens three points further adrift.
