Palace will host Liverpool at Selhurst Park on Monday night in the first match since Zaha penned the new terms, and the forward could celebrate by becoming the club's leading Premier League scorer of all time with a goal against the Reds.
"There were no spectacular signings but if you want you can see Zaha as a spectacular transfer," he told reporters.
"I think they are pretty happy that Wilfried signed a new contract. He's very important and last year was probably the best example of that."
Zaha's goal against Fulham on the opening weekend took him to 23 in the Premier League, level with Chris Armstrong's club tally.