Reading drop into the relegation zone after their 2-0 defeat at home to Watford.
Mark Yeates gave the Hornets the lead on 12 minutes when his curled free-kick found the bottom corner.
John Eustace condemned the Royals to their fourth consecutive defeat on 51 minutes when he provided a simple finish from six yards.
The win takes Watford into 16th, while Reading now lie in 23rd.