diff --git a/doc/user/chapters/using.org b/doc/user/chapters/using.org
index ba307328d3b12b3572ce6f37661daf8034192195..7b04d4bb4364c179fc09d889f91f7f08cc1f8e7f 100644
--- a/doc/user/chapters/using.org
+++ b/doc/user/chapters/using.org
@@ -183,6 +183,7 @@
      #+begin_example
      export STARPU_FXT_TRACE=1
      #+end_example
+     And passing the ~-T~ option to the ~chameleon_xtesting~ program.
      By doing so, traces are generated after each execution of a program which
      uses StarPU in the directory pointed by the
      [[https://files.inria.fr/starpu/doc/html/ExecutionConfigurationThroughEnvironmentVariables.html][STARPU_FXT_PREFIX]]