diff --git a/setup/so-setup b/setup/so-setup
index 796764cca..691ba3871 100755
--- a/setup/so-setup
+++ b/setup/so-setup
@@ -286,7 +286,7 @@ percentage=0
 	progress_bg_proc=$!
 	installer_prereq_packages
 	install_success=$?
-	kill -9 $progress_bg_proc
+	kill -9 $progress_bg_proc &> /dev/null
 	if [[ $install_success -gt 0 ]]; then
 		error "Could not install packages required for setup, exiting now."
 		kill -SIGUSR1 "$setup_proc" &> /dev/null; exit 1