diff --git a/lib/output.js b/lib/output.js
index f8787582..431e6a01 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -1142,7 +1142,11 @@ function OutputStream(options) {
                    && parseFloat(key) >= 0) {
             output.print(make_num(key));
         } else if (RESERVED_WORDS(key) ? output.option("screw_ie8") : is_identifier_string(key)) {
-            output.print_name(key);
+            if (quote && output.option("quote_style")) {
+                output.print_string(key, quote);
+            } else {
+                output.print_name(key);
+            }
         } else {
             output.print_string(key, quote);
         }