Roy Hodgson praised the impact of substitute Peter Odemwingie as he created Shane Long's equaliser at Loftus Road.
Hodgson had publicly criticised the Nigeria international about his lack of goals and game time this term, after he secured a lucrative contract last summer.
But Odemwingie showed he is recoverying well from the injuries that have hampered his campaign so far by creating the vital goal for Long.
"He needed that 20-25 minutes, it was good to see him in such good form, and his pass for the goal and his work-rate in terms of threatening behind the QPR defence was very useful for us," the Baggies boss told Sky Sports.
"It was at a time of the game we were losing 1-0, and we had to try and take a few chances to get forward, but I think the defending was very solid throughout."
Heidar Helguson put Rangers ahead after 20 minutes as they went in search of only their second home win of the term.
Shaun Wright-Phillips through he had scored a brilliant volley just minutes after the goal but it was harshly ruled out for offside.
The Baggies had to ride their luck at times as Wright-Phillips and Barton both missed good chances to extend their lead.
Most of the these chances were fashioned through mistakes in the Baggies backline but they clung on after Long's equaliser for their point.
"Unfortunately, the chances that came their way were silly mix-ups or unfortunate back passes," added Hodgson.