diff --git a/.convert_helper.sh b/.convert_helper.sh
index a8f3e0a..d96dc9e 100644
--- a/.convert_helper.sh
+++ b/.convert_helper.sh
@@ -1,2 +1,3 @@
 #!/usr/bin/env bash
+# Should not be called manually
 ffmpeg -i "$1" "$(echo "$1" | sed -E "s/\.[A-Za-z0-9]+$/.$2/" | sed "s#\./files#./convert#")"