diff --git a/packages/react-dom/src/server/ReactThreadIDAllocator.js b/packages/react-dom/src/server/ReactThreadIDAllocator.js
index 48ada0044355..b8f7b622df76 100644
--- a/packages/react-dom/src/server/ReactThreadIDAllocator.js
+++ b/packages/react-dom/src/server/ReactThreadIDAllocator.js
@@ -8,7 +8,7 @@
  */
 
 // Allocates a new index for each request. Tries to stay as compact as possible so that these
-// indices can be used to reference a tightly packaged array. As opposed to being used in a Map.
+// indices can be used to reference a tightly packed array. As opposed to being used in a Map.
 // The first allocated index is 1.
 
 import invariant from 'shared/invariant';