diff --git a/config.sh b/config.sh
index d4c07bc..97cda15 100644
--- a/config.sh
+++ b/config.sh
@@ -212,7 +212,10 @@ timeout 300;
 retry 60;
 EOF
 
-sed -i -e 's/ rhgb quiet//' /boot/grub2/grub.conf
+  if [ -f /boot/grub2/grub.conf ]; then
+    sed -i -e 's/ rhgb quiet//' /boot/grub2/grub.conf
+  fi
+    sed -i -e 's/ rhgb quiet//' /etc/default/grub
   cat > /etc/modprobe.d/blacklist-nouveau.conf << EOL
 blacklist nouveau
 EOL
@@ -425,7 +428,10 @@ EOF
 
   rpm --import /tmp/key
   # remove these for debugging
-  sed -i -e 's/ rhgb quiet//' /boot/grub2/grub.conf
+  if [ -f /boot/grub2/grub.conf ]; then
+    sed -i -e 's/ rhgb quiet//' /boot/grub2/grub.conf
+  fi
+  sed -i -e 's/ rhgb quiet//' /etc/default/grub
 
   # enable resizing on copied AMIs
   echo 'install_items+=" sgdisk "' > /etc/dracut.conf.d/sgdisk.conf