diff --git a/m4a2wav b/m4a2wav
index 4e5ed24..f486804 100755
--- a/m4a2wav
+++ b/m4a2wav
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 usage() {
-	echo <<EOF
+	cat <<EOF
 m4a2wav
 
 Usage:
@@ -12,4 +12,12 @@ wav format. Requires ffmpeg.
 EOF
 }
 
-fd -e m4a -x ffmpeg -i {} {.}.wav
\ No newline at end of file
+case "$@" in
+	--help)
+		usage
+		exit 1
+		;;
+	*)
+		fd -e m4a -x ffmpeg -i '{}' '{.}'.wav
+		;;
+esac