diff --git a/build_library/qemu_template.sh b/build_library/qemu_template.sh
index 1fc6140aa18..a1ed6cfa9d6 100755
--- a/build_library/qemu_template.sh
+++ b/build_library/qemu_template.sh
@@ -25,7 +25,7 @@ DISKS=()
 SNAPSHOT=""
 USAGE="Usage: $0 [-a authorized_keys] [--] [qemu options...]
 Options:
-    -i FILE     File containing an Ignition config
+    -i FILE     File containing a Butane config or an Ignition config
                 (needs \"-append 'flatcar.first_boot=1'\" for already-booted or PXE images)
     -u FILE     Cloudinit user-data as either a cloud config or script.
     -c FILE     Config drive as an iso or fat filesystem image.