diff --git a/tools/xen/prepare_guest.sh b/tools/xen/prepare_guest.sh
index 0946126..440774e 100755
--- a/tools/xen/prepare_guest.sh
+++ b/tools/xen/prepare_guest.sh
@@ -21,7 +21,7 @@
 DOMZERO_USER="$4"
 
 
-function setup_domzero_user() {
+function setup_domzero_user {
     local username
 
     username="$1"