1 files changed, 3 insertions, 0 deletions
diff --git a/src/number.js b/src/number.js
index 0ca8831..f0c53e0 100644
--- a/src/number.js
+++ b/src/number.js
@@ -48,6 +48,9 @@ SVG.Number = SVG.invent({
           this.value
       ) + this.unit
     }
+  , toJSON: function() {
+      return this.toString()
+    }
   , // Convert to primitive
     valueOf: function() {
       return this.value