diff --git a/util/chromeos/crosfirmware.sh b/util/chromeos/crosfirmware.sh
index 3d0f061..e72ff7d 100755
--- a/util/chromeos/crosfirmware.sh
+++ b/util/chromeos/crosfirmware.sh
@@ -137,7 +137,7 @@
 # Main
 #
 
-BOARD=$1
+BOARD=${1,,}
 
 exit_if_dependencies_are_missing