1 files changed, 17 insertions, 2 deletions
diff --git a/lib/output.js b/lib/output.js
index 5c11088b..d71f6aac 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -592,6 +592,13 @@ function OutputStream(options) {
             || p instanceof AST_Call && p.expression === this;
     });
 
+    PARENS([ AST_Infinity, AST_NaN ], function(output){
+        var p = output.parent();
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Call && p.expression === this
+            || p instanceof AST_Unary && p.operator != "+" && p.operator != "-";
+    });
+
     PARENS(AST_Seq, function(output){
         var p = output.parent();
         return p instanceof AST_Call             // (foo, bar)() or foo(1, (2, 3), 4)
@@ -1254,10 +1261,18 @@ function OutputStream(options) {
     });
     DEFPRINT(AST_Hole, noop);
     DEFPRINT(AST_Infinity, function(self, output){
-        output.print("Infinity");
+        output.print("1");
+        output.space();
+        output.print("/");
+        output.space();
+        output.print("0");
     });
     DEFPRINT(AST_NaN, function(self, output){
-        output.print("NaN");
+        output.print("0");
+        output.space();
+        output.print("/");
+        output.space();
+        output.print("0");
     });
     DEFPRINT(AST_This, function(self, output){
         output.print("this");