Fix doxygen issue

4 jobs for 2.0.2-2 in 55 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #9446
build

00:00:24

 
  Test
passed #9447
check

00:00:30

98.8%
 
  External
failed jenkins

00:00:34

failed jenkins

00:00:37