diff --git a/setup/so-functions b/setup/so-functions
index ad2ce7f41..35f8aea2f 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -1450,11 +1450,11 @@ reinstall_init() {
 
 		# Remove the old launcher package in case the config changes
 		if [ $OS = 'centos' ]; then
-			if rpm -qa | grep launcher-final; then
+			if rpm -qa | grep -q launcher-final; then
 				yum remove -y launcher-final
 			fi
 		else
-			if dpkg -l | grep launcher-final; then
+			if dpkg -l | grep -q launcher-final; then
 				apt purge -y launcher-final
 			fi
 		fi