Index: graphspell-js/dawg.js
==================================================================
--- graphspell-js/dawg.js
+++ graphspell-js/dawg.js
@@ -381,11 +381,11 @@
             "nNode": this.nNode,
             "nArc": this.nArc,
             "nAff": this.nAff,
             "cStemming": this.cStemming,
             "nTag": this.nTag,
-            "dChar": this.dChar,
+            "dChar": helpers.mapToObject(this.dChar),
             "_arcMask": this._arcMask,
             "_finalNodeMask": this._finalNodeMask,
             "_lastArcMask": this._lastArcMask,
             "_addrBitMask": this._addrBitMask,
             "nBytesOffset": this.nBytesOffset