diff --git a/scripts/which_firmware b/scripts/which_firmware
old mode 100644
new mode 100755
index f4a084730..e00f761ef
--- a/scripts/which_firmware
+++ b/scripts/which_firmware
@@ -1,2 +1,5 @@
 #!/bin/sh
-sudo dmesg | awk '/Loading firmware:/{print "/lib/firmware/"$7}' | paste -sd ','
+printf 'This script outputs firmware information in the format expected by /etc/genkernel.conf\n'
+printf 'FIRMWARE_FILES="'
+sudo dmesg | awk '/Loading firmware:/{print $7}' | sort -u | paste -sd ',' | tr -d '\n'
+printf '"\n'