diff --git a/packages/react/src/ReactElementValidator.js b/packages/react/src/ReactElementValidator.js
index 14af2ade8133a..0451025b6c7f1 100644
--- a/packages/react/src/ReactElementValidator.js
+++ b/packages/react/src/ReactElementValidator.js
@@ -35,7 +35,7 @@ import {setExtraStackFrame} from './ReactDebugCurrentFrame';
 import {describeUnknownElementTypeFrameInDEV} from 'shared/ReactComponentStackFrame';
 import hasOwnProperty from 'shared/hasOwnProperty';
 
-const REACT_CLIENT_REFERENCE: symbol = Symbol.for('react.client.reference');
+const REACT_CLIENT_REFERENCE = Symbol.for('react.client.reference');
 
 function setCurrentlyValidatingElement(element) {
   if (__DEV__) {
diff --git a/packages/react/src/jsx/ReactJSXElementValidator.js b/packages/react/src/jsx/ReactJSXElementValidator.js
index 1cc8075da58da..da000079ee90f 100644
--- a/packages/react/src/jsx/ReactJSXElementValidator.js
+++ b/packages/react/src/jsx/ReactJSXElementValidator.js
@@ -32,7 +32,7 @@ import ReactSharedInternals from 'shared/ReactSharedInternals';
 const ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;
 const ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
 
-const REACT_CLIENT_REFERENCE: symbol = Symbol.for('react.client.reference');
+const REACT_CLIENT_REFERENCE = Symbol.for('react.client.reference');
 
 function setCurrentlyValidatingElement(element) {
   if (__DEV__) {