Ben Affleck‘s ongoing recovery will not be derailed after one night.

Hours after Affleck was seen stumbling outside a Halloween party in West Hollywood, Ben Affleck — who has been candid about his struggles with alcoholism — said he will not let a “slip” deter his progress.

“It happens. It was a slip. But I’m not going to let it derail me,” the 47-year-old actor told TMZ on Sunday when asked about the previous night’s party.

Affleck did not comment when asked whether he’d be returning to rehab.

Affleck, who shares daughters Violet, 13, and Seraphina, 10, and son Samuel, 7, with ex-wife Jennifer Garner, was photographed Sunday with his family.

On Saturday night, Affleck appeared to lose his balance while departing the Unicef Masquerade ball. Wearing a dark suit and a skull mask, the Oscar winner was filmed holding onto an SUV to steady himself. It is not clear what caused Affleck to lose his footing.

A source told Page Six on Sunday that sobriety is “difficult and elusive for everyone struggling with addiction,” and, “Ben has acknowledged he’s going to slip up from time to time … it was never as if this was simply behind him.”

Ahead of his evening out, Affleck spoke about his recovery in an Instagram post, and also addressed his foray into online dating, as Page Six previously reported.

“HA, you got me. I’m dating,” Affleck wrote. “But let’s be serious for a moment and talk about something that is actually important. I have been in recovery for over a year and part of that is helping out others.”

He continued, “@themidnightmission is an incredible organization that helps those in need with housing, training, development and recovery. I’m making a donation today because there are people battling addiction every day that don’t have the resources and need help. @raya, you in? Who else is with me?”