diff --git a/to_opus.sh b/to_opus.sh
index 489746e..5842e19 100644
--- a/to_opus.sh
+++ b/to_opus.sh
@@ -14,17 +14,12 @@ function finish {
 }
 trap finish EXIT
 
-print_usage() {
-  printf "Usage: ..."
-}
-
 extension=''
 
 while getopts 'e:' flag; do
   case "${flag}" in
     e) extension+=("$OPTARG");;
-    *) print_usage
-       exit 1 ;;
+    *) exit 1 ;;
   esac
 done