diff --git a/odometer.js b/odometer.js
index dcf926c..8a207c9 100644
--- a/odometer.js
+++ b/odometer.js
@@ -270,6 +270,9 @@
       }
       _ref1 = parsed.slice(1, 4), repeating = _ref1[0], radix = _ref1[1], fractional = _ref1[2];
       precision = (fractional != null ? fractional.length : void 0) || 0;
+      if( typeof radix === "string" && radix.length === 0 ){
+          radix = null;
+      }
       return this.format = {
         repeating: repeating,
         radix: radix,