diff --git a/packages/react-reconciler/src/ReactFiberExpirationTime.js b/packages/react-reconciler/src/ReactFiberExpirationTime.js
index 72d58dff4eb9f..f79f4cdaaac97 100644
--- a/packages/react-reconciler/src/ReactFiberExpirationTime.js
+++ b/packages/react-reconciler/src/ReactFiberExpirationTime.js
@@ -43,7 +43,7 @@ const MAGIC_NUMBER_OFFSET = Batched - 1;
 
 // 1 unit of expiration time represents 10ms.
 export function msToExpirationTime(ms: number): ExpirationTime {
-  // Always add an offset so that we don't clash with the magic number for NoWork.
+  // Always subtract an offset so that we don't clash with the magic number for NoWork.
   return MAGIC_NUMBER_OFFSET - ((ms / UNIT_SIZE) | 0);
 }