"The referee made a big mistake at the end of the game, it was farcical," Redknapp said after the 2-1 defeat.
"He made Gianluca Festa move the free-kick back but didn't make the Wednesday player move back the full ten yards and everyone in the ground knew he was wrong to let the free-kick go ahead.
"I have spoken to the official and he doesn't see what he did wrong but it was a scandalous decision and made the whole game an absolute farce."
SHEFFIELD WEDNESDAY MATCH REPORT