Haskell represented Wasps from 2002 to 2009 after graduating from the club's academy, making his Premiership debut at 18 against Harlequins in September 2003.
He joined Stade Francais in 2009 where he spent two seasons but Wasps moved swiftly when the French giants did not renew his contract.
The 26-year-old will join Ricoh Black Rams after the 2011 World Cup, the side coached by former interim Wasps boss Leon Holden, before a season of Super Rugby.
Haskell said: "I was very flattered and humbled by Wasps enthusiasm and commitment to re-sign me. As everyone knows my family and I were fans of Wasps long before I was privileged to be invited to join the Wasps Academy.
"So returning to the club that has been pivotal in propelling me to where I am fortunate enough to stand today, was not one of the harder decisions I have ever had to make!"
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.