diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
index 0b15fb13a2351..463364793f528 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
@@ -1803,7 +1803,7 @@ function commitRootImpl(root, renderPriorityLevel) {
 
   // Check if there are any effects in the whole tree.
   // TODO: This is left over from the effect list implementation, where we had
-  // to check for the existence of `firstEffect` to satsify Flow. I think the
+  // to check for the existence of `firstEffect` to satisfy Flow. I think the
   // only other reason this optimization exists is because it affects profiling.
   // Reconsider whether this is necessary.
   const subtreeHasEffects =
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
index 7b03e4cc743df..23684af637550 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
@@ -1803,7 +1803,7 @@ function commitRootImpl(root, renderPriorityLevel) {
 
   // Check if there are any effects in the whole tree.
   // TODO: This is left over from the effect list implementation, where we had
-  // to check for the existence of `firstEffect` to satsify Flow. I think the
+  // to check for the existence of `firstEffect` to satisfy Flow. I think the
   // only other reason this optimization exists is because it affects profiling.
   // Reconsider whether this is necessary.
   const subtreeHasEffects =