Stamos, 56, shared a photo of the couch blocking a set of stairs while son Billy is wedged between the piece of furniture and a door.
"Baby safety gate or one of the most iconic couches in pop TV history? You, make the call," the actor wrote alongside the photo.
The "Full House" family was quick to respond.
"I don't know what it is John, but it comforts me," Saget wrote.
"WHAAAAATTTT?!" Jodie Sweetin commented.
"Who got the sea pappy?" Dave Coulier chimed in, alluding to a prop in the living room.
"Thief!" Andrea Barber joked.
That couch may come in handy to prevent Billy, who'll turn 2 this month, from taking a tumble.
Like the majority of the country, Stamos, wife Caitlin and their little guy all remain quarantined in their home to stop the spread of the coronavirus. The family is making the most out of their time, too.
Last week, Stamos posted a video of the three of them singing "It's a Small World (After All)" while they sat in bed, although Billy didn't exactly go along with his parents.
"It's a Small World' family Sing-A-Long turned into a 'Small Disaster!" he wrote.