diff --git a/local/bin/luma-to-png b/local/bin/luma-to-png
index 674fce1..6c4bbf0 100755
--- a/local/bin/luma-to-png
+++ b/local/bin/luma-to-png
@@ -1,2 +1,2 @@
 #!/bin/zsh
-magick $f -alpha set -fill 'rgba(0,0,0,0)' -draw 'color 0,0 point' $f:r.png
+magick $1 -alpha set -fill 'rgba(0,0,0,0)' -draw 'color 0,0 point' $1:r.png