Ulnar shortening is well accepted in the treatment of ulnar abutment but less so in patients with a shortened radius and ulnar-sided wrist pain as a result of a Colles fracture. Sixteen patients with pain and reduced range of movement (ROM) and a median preoperative ulnar positive variance of 5 mm (range 0.5-11) had 17 osteotomies. Nine were male and seven female with a median age of 35 (range 15-55) years were operated on. Fifteen patients with 16 osteotomies could be reached for follow-up. The ulna was shortened by a median of 4.5 mm (range 3-12). The median pain score was reduced by 3 points (range 0-5). Postoperative ROM was improved in nine, unchanged in six, and reduced in one wrists. There were four complications: one re-fracture, two transient paraesthesiae, and one superficial infection. Seven of the patients regarded the result as excellent, six as good, three as fair, and none regarded it as poor. Thirteen of the 16 would have chosen the operation again, three would not.