diff --git a/packages/react-dom/src/events/ChangeEventPlugin.js b/packages/react-dom/src/events/ChangeEventPlugin.js
index ce0d328d876d5..2d04e5dd43f07 100644
--- a/packages/react-dom/src/events/ChangeEventPlugin.js
+++ b/packages/react-dom/src/events/ChangeEventPlugin.js
@@ -231,14 +231,8 @@ function getTargetInstForInputOrChangeEvent(topLevelType, targetInst) {
   }
 }
 
-function handleControlledInputBlur(inst, node) {
-  // TODO: In IE, inst is occasionally null. Why?
-  if (inst == null) {
-    return;
-  }
-
-  // Fiber and ReactDOM keep wrapper state in separate places
-  let state = inst._wrapperState || node._wrapperState;
+function handleControlledInputBlur(node) {
+  let state = node._wrapperState;
 
   if (!state || !state.controlled || node.type !== 'number') {
     return;
@@ -303,7 +297,7 @@ const ChangeEventPlugin = {
 
     // When blurring, set the value attribute for number inputs
     if (topLevelType === TOP_BLUR) {
-      handleControlledInputBlur(targetInst, targetNode);
+      handleControlledInputBlur(targetNode);
     }
   },
 };