diff --git a/helper/tmpdir-setup b/helper/tmpdir-setup
index fe47dc79..d79c1a53 100755
--- a/helper/tmpdir-setup
+++ b/helper/tmpdir-setup
@@ -52,12 +52,10 @@ cmd_cleanup() {
     (( $# == 1 )) || usage
     MXQ_JOBID=$1
 
-    (
-        shopt -s dotglob;
-        rm -rf /dev/shm/mxqd/mnt/job/$MXQ_JOBID/*
-        umount /dev/shm/mxqd/mnt/job/$MXQ_JOBID
-        rmdir /dev/shm/mxqd/mnt/job/$MXQ_JOBID
-    ) &
+    shopt -s dotglob;
+    rm -rf /dev/shm/mxqd/mnt/job/$MXQ_JOBID/*
+    umount /dev/shm/mxqd/mnt/job/$MXQ_JOBID
+    rmdir /dev/shm/mxqd/mnt/job/$MXQ_JOBID
 }
 
 (( $# > 0 )) || usage