diff --git a/packages/react-reconciler/src/ReactFiberBeginWork.js b/packages/react-reconciler/src/ReactFiberBeginWork.js
index 4e7ab1171d8b4..7891394377f1f 100644
--- a/packages/react-reconciler/src/ReactFiberBeginWork.js
+++ b/packages/react-reconciler/src/ReactFiberBeginWork.js
@@ -283,6 +283,8 @@ function updateMemoComponent(
       );
     }
   }
+  // React DevTools reads this flag.
+  workInProgress.effectTag |= PerformedWork;
   let newChild = createWorkInProgress(
     currentChild,
     nextProps,