diff --git a/tools/xen/scripts/on_exit.sh b/tools/xen/scripts/on_exit.sh
index a4db39c..2441e3d 100755
--- a/tools/xen/scripts/on_exit.sh
+++ b/tools/xen/scripts/on_exit.sh
@@ -7,8 +7,7 @@
 
 on_exit()
 {
-    for i in $(seq $((${#on_exit_hooks[*]} - 1)) -1 0)
-    do
+    for i in $(seq $((${#on_exit_hooks[*]} - 1)) -1 0); do
         eval "${on_exit_hooks[$i]}"
     done
 }
@@ -17,8 +16,7 @@
 {
     local n=${#on_exit_hooks[*]}
     on_exit_hooks[$n]="$*"
-    if [[ $n -eq 0 ]]
-    then
+    if [[ $n -eq 0 ]]; then
         trap on_exit EXIT
     fi
 }