diff --git a/setup/so-setup b/setup/so-setup
index 8fae8fa77..6476e32d3 100755
--- a/setup/so-setup
+++ b/setup/so-setup
@@ -86,7 +86,7 @@ fi
 # Make sure if ISO is specified that we are dealing with CentOS or Rocky
 title "Detecting if this is an ISO install"
 if [[ "$setup_type" == 'iso' ]]; then
-	if [[ $is_centos || $is_rocky ]]; then
+	if [[ $is_rpm ]]; then
 		is_iso=true
 	else
 		echo "Only use 'so-setup iso' for an ISO install on Security Onion ISO images. Please run 'so-setup network' instead."
@@ -99,7 +99,7 @@ if [[ $is_desktop ]]; then
 	title "This is a desktop install"
 
 	# Make sure it's CentOS or Rocky Linux
-	if [[ $is_rocky || $is_centos ]]; then
+	if [[ $is_rpm ]]; then
 		info "Security Onion Desktop is supported on this OS."
 	else
 		info "Security Onion Desktop is not supported on this OS."