diff --git a/js/common/view/RatioHandNode.ts b/js/common/view/RatioHandNode.ts
index 5133d31f..51605852 100644
--- a/js/common/view/RatioHandNode.ts
+++ b/js/common/view/RatioHandNode.ts
@@ -35,7 +35,7 @@ type CreateIconOptions = {
   handNodeOptions?: NodeOptions
 };
 
-class RatioHandNode extends AccessibleSlider( Node ) {
+class RatioHandNode extends AccessibleSlider( Node, 0 ) {
   private resetRatioHandNode: () => void;
 
   /**