diff --git a/lib/output.js b/lib/output.js
index 50e5aa43..070fdd1d 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -66,6 +66,7 @@ function OutputStream(options) {
         indent_level     : 4,
         quote_keys       : false,
         space_colon      : true,
+        space_function   : false,
         ascii_only       : false,
         unescape_regexps : false,
         inline_script    : false,
@@ -838,8 +839,10 @@ function OutputStream(options) {
         if (!nokeyword) {
             output.print("function");
         }
-        if (self.name) {
+        if (options.space_function || self.name) {
             output.space();
+        }
+        if (self.name) {
             self.name.print(output);
         }
         output.with_parens(function(){