Tony Diagne's equaliser saved League Two side Macclesfield from a shock FA Cup defeat at non-league Chelmsford.
The Clarets took a shock lead when Max Cornhill pounced from close range after Macclesfield goalkeeper Jose Veiga could only parry Justin Miller's shot.
Kezie Ibe headed over when well placed for Blue Square Bet South Chelmsford, aiming to reach the third round for only the third time ever.
However, they were denied when Diagne blasted home a leveller from six yards.
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Chelmsford City manager Glenn Pennyfather told BBC Essex:
"It's a magnificent effort from my players. I couldn't be more proud of them. Unfortunately, we've made one mistake, where we haven't dealt with the long throw.
"Full credit to us, I can't complain. I thought we passed the ball well. We got to the tempo of the game, which was important, and I thought we were the better side.
"You do need that little bit of luck. Maybe that deserted us on one or two occasions in front of goal."
Macclesfield Town manager Gary Simpson told BBC Radio Manchester:
"In the second half, we changed the shape and I thought it was us in the ascendancy coming to the end of the game.
"Tony Diagne has popped up up with quite a few goals for us now and it was great he did.
"It's only half-time. They've got a better away record than they had at home, so it's not going to be easy."