diff --git a/lib/output.js b/lib/output.js
index ddc28820..dd94fea5 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -152,10 +152,8 @@ function OutputStream(options) {
               case "\x0B": return options.screw_ie8 ? "\\v" : "\\x0B";
               case "\0":
                   return /[0-7]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
-              default:
-                  return to_ascii(s);
             }
-            return s;
+            return to_ascii(s);
         });
         function quote_single() {
             return "'" + str.replace(/\x27/g, "\\'") + "'";