diff --git a/src/dat/controllers/NumberController.js b/src/dat/controllers/NumberController.js
index 294e36c..4cab081 100644
--- a/src/dat/controllers/NumberController.js
+++ b/src/dat/controllers/NumberController.js
@@ -46,7 +46,7 @@ define([
         this.__impliedStep = 1; // What are we, psychics?
       } else {
         // Hey Doug, check this out.
-        this.__impliedStep = Math.pow(10, Math.floor(Math.log(this.initialValue)/Math.LN10))/10;
+        this.__impliedStep = Math.pow(10, Math.floor(Math.log(Math.abs(this.initialValue))/Math.LN10))/10;
       }
 
     } else {
@@ -142,4 +142,4 @@ define([
 
   return NumberController;
 
-});
\ No newline at end of file
+});