diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 1b0f184d7..0ee475acb 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -62,6 +62,7 @@ IRONIC_INSPECTOR_INTERNAL_IP_WITH_NET="$IRONIC_INSPECTOR_INTERNAL_IP/$IRONIC_INS
 IRONIC_IS_HARDWARE=$(trueorfalse False IRONIC_IS_HARDWARE)
 IRONIC_INSPECTOR_NODE_NOT_FOUND_HOOK=${IRONIC_INSPECTOR_NODE_NOT_FOUND_HOOK:-""}
 IRONIC_INSPECTOR_OVS_PORT=${IRONIC_INSPECTOR_OVS_PORT:-brbm-inspector}
+IRONIC_INSPECTOR_EXTRA_KERNEL_CMDLINE=${IRONIC_INSPECTOR_EXTRA_KERNEL_CMDLINE:-""}
 
 GITDIR["python-ironic-inspector-client"]=$DEST/python-ironic-inspector-client
 GITREPO["python-ironic-inspector-client"]=${IRONIC_INSPECTOR_CLIENT_REPO:-${GIT_BASE}/openstack/python-ironic-inspector-client.git}
@@ -142,7 +143,7 @@ function prepare_tftp {
     IRONIC_INSPECTOR_INITRAMFS_PATH="$IRONIC_INSPECTOR_IMAGE_PATH.initramfs"
     IRONIC_INSPECTOR_CALLBACK_URI="$IRONIC_INSPECTOR_INTERNAL_URI/v1/continue"
 
-    IRONIC_INSPECTOR_KERNEL_CMDLINE="ipa-inspection-callback-url=$IRONIC_INSPECTOR_CALLBACK_URI systemd.journald.forward_to_console=yes"
+    IRONIC_INSPECTOR_KERNEL_CMDLINE="$IRONIC_INSPECTOR_EXTRA_KERNEL_CMDLINE ipa-inspection-callback-url=$IRONIC_INSPECTOR_CALLBACK_URI systemd.journald.forward_to_console=yes"
     IRONIC_INSPECTOR_KERNEL_CMDLINE="$IRONIC_INSPECTOR_KERNEL_CMDLINE vga=normal console=tty0 console=ttyS0"
     IRONIC_INSPECTOR_KERNEL_CMDLINE="$IRONIC_INSPECTOR_KERNEL_CMDLINE ipa-inspection-collectors=$IRONIC_INSPECTOR_COLLECTORS"
     IRONIC_INSPECTOR_KERNEL_CMDLINE="$IRONIC_INSPECTOR_KERNEL_CMDLINE ipa-debug=1"