The England international "accidentally" liked a tweet of a video titled "Wenger Needs to Go!" after the 3-1 loss last weekend.
The result has seen Wenger's future come under increased scrutiny this week with a two-year contract extension yet to be signed.
Arsenal fans rejoice on Twitter as Ian Wright hints at Arsene Wenger exit
Fri, February 10, 2017
Former Arsenal striker Ian Wright has hinted that Arsene Wenger could be on his way out of the Emirates at the end of the season, and Gunners fans are delighted
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Ian Wright has admitted Arsene Wenger could leave Arsenal, and fans can't cope
But Oxlade-Chamberlain insists he never intended to like the Twitter post and revealed Wenger didn't know what had happened.
"It was a complete and utter accident," he told Sky Sports.
Arsenal midfielder Alex Oxlade-Chamberlain
"I think people know me as a character and if I'd meant to have done that, it would have been out of character for me.
"The title of the tweet I accidentally liked wasn't ideal but we've sorted it out. I spoke to the manager about it and explained the accident. I might not go on Twitter again too soon after games."
He added on Wenger: "He didn't have a clue what I was talking about. He just heard the word accident and we moved on."