diff --git a/src/clients/POSIX/qsub2pbs.py b/src/clients/POSIX/qsub2pbs.py
index b546bc10c76fd25b81e20f2104110b4b6d5658c2..929a95439c01ff579817b245142d7632444c29ae 100755
--- a/src/clients/POSIX/qsub2pbs.py
+++ b/src/clients/POSIX/qsub2pbs.py
@@ -322,7 +322,7 @@ def main():
     def_spec['kernel']         = CN_DEFAULT_KERNEL
     def_spec['ion_kernel']     = ION_DEFAULT_KERNEL
     def_spec['queue']          = 'default'
-    def_spec['umask']          = 022
+    def_spec['umask']          = 0o022
     def_spec['run_project']    = False
     def_spec['user_list']      = [user]
     def_spec['procs']          = False