diff --git a/glicid/services/parallel.scm b/glicid/services/parallel.scm
index 0494621..c5a1f11 100644
--- a/glicid/services/parallel.scm
+++ b/glicid/services/parallel.scm
@@ -254,7 +254,7 @@
         (chown "/etc/slurm" (passwd:uid (getpwnam "slurm")) (passwd:gid (getpwnam "slurm")))
         (for-each (lambda (slurm-file)
           (chown slurm-file (passwd:uid (getpwnam "slurm")) (passwd:gid (getpwnam "slurm")))
-          (chmod "0600" slurm-file)
+          (chmod slurm-file #o600)
         )(find-files "/etc/slurm/"))
         #t
     )