diff --git a/packages/react-reconciler/src/ReactInternalTypes.js b/packages/react-reconciler/src/ReactInternalTypes.js
index 126bb02cfdd7e..d643b1f9c2612 100644
--- a/packages/react-reconciler/src/ReactInternalTypes.js
+++ b/packages/react-reconciler/src/ReactInternalTypes.js
@@ -157,9 +157,6 @@ export type Fiber = {
   subtreeFlags: Flags,
   deletions: Array<Fiber> | null,
 
-  // Singly linked list fast path to the next fiber with side-effects.
-  nextEffect: Fiber | null,
-
   // The first and last fiber with side-effect within this subtree. This allows
   // us to reuse a slice of the linked list when we reuse the work done within
   // this fiber.