1 files changed, 1 insertions, 1 deletions
diff --git a/src/JSON.js b/src/JSON.js
index 0cbe6b2d..9ec95805 100644
--- a/src/JSON.js
+++ b/src/JSON.js
@@ -72,7 +72,7 @@ function toJsonArray(buf, obj, pretty, stack){
       var childPretty = pretty ? pretty + "  " : false;
       var keys = [];
       for(var k in obj) {
-        if (k.indexOf('$') === 0 || obj[k] === _undefined)
+        if (obj[k] === _undefined)
           continue;
         keys.push(k);
       }