diff --git a/js/react.js b/js/react.js
index 63bb3fb2..ee718d08 100644
--- a/js/react.js
+++ b/js/react.js
@@ -711,7 +711,6 @@ var isUnitlessNumber = {
 
   // SVG-related properties
   fillOpacity: true,
-  stopOpacity: true,
   strokeDashoffset: true,
   strokeOpacity: true,
   strokeWidth: true