diff --git a/setup.sh b/setup.sh
index bdbbf69..a890edd 100644
--- a/setup.sh
+++ b/setup.sh
@@ -40,7 +40,7 @@ function we_are_changerooted () {
 
 function no_kernel_update_in_iso () {
     #1.1
-    sed -r -e 's'$'\x1''#(IgnorePkg)[^\r\n\f]+'$'\x1''\1 = linux linux-headers'$'\x1''g' /etc/pacman.conf
+    sed -ri -e 's'$'\x1''#(IgnorePkg)[^\r\n\f]+'$'\x1''\1 = linux linux-headers'$'\x1''g' /etc/pacman.conf
 }
 
 function set_ntp () {