But the deal is simply putting a plaster on a gaping wound in east London because it fails to answer West Ham's call for a decent long term solution at right back.
The club currently has an exciting crop of youngster emerging from its famous Academy.
Many of those players are defenders but none operate at right back.
The Hammers had hoped to try and land Jenkinson on a permanent deal this summer after his outstanding loan spell under Sam Allardyce last season.
But despite being well stocked in the right back department with the likes of Mathieu Debuchy, Hector Bellerin and Callum Chambers, Arsene Wenger was reluctant to let him leave.
So much so that the club today agreed a new extended deal with the boyhood Gunners fan and immediately agreed to send him out on loan again, as per the Mirror.
While West Ham are getting a fantastic player for a season, it fails to solve what has become something of a problem position for the club.
How do you solve a problem like right back?
Ever since Glen Johnson shone briefly before joining Chelsea when the Hammers were relegated under the hapless Glen Roeder in 2003, the right back position has been like a revolving door.
From Thomas Repka to Lionel Scaloni and more recently Julien Faubert a string of players have failed to really make the position their own.
Guy Demel did a decent enough job of it with his understudy Joey O'Brien during Allardyce's tenure. But the former has now left the club while the latter was frozen out last season and is expected to be used as a squad player under Slaven Bilic.
With no youngsters coming through for that position in the immediate future to fill the void, Jenkinson will plug the gap for now.
And it will only be for now as Arsenal clearly see him as part of their long-term plans.
In the cold light of day it is a deal which may not sit easily with some Hammers fans who feel Arsenal are treating them like a feeder club.
One positive is that the Jenkinson deal at least gives West Ham a year to identify that long-term replacement and ensure they make the right choice going into the Olympic Stadium next summer.