diff --git a/packages/react-native/React/Fabric/RCTPrimitives.h b/packages/react-native/React/Fabric/RCTPrimitives.h
index 8b45be5984a..7d3c2fef1d0 100644
--- a/packages/react-native/React/Fabric/RCTPrimitives.h
+++ b/packages/react-native/React/Fabric/RCTPrimitives.h
@@ -7,4 +7,4 @@
 
 #import <Foundation/Foundation.h>
 
-typedef NSInteger ReactTag;
+using ReactTag = NSInteger;
diff --git a/packages/react-native/React/Fabric/RCTSurfaceRegistry.h b/packages/react-native/React/Fabric/RCTSurfaceRegistry.h
index 4b369cc64b4..a37bdfbbaa2 100644
--- a/packages/react-native/React/Fabric/RCTSurfaceRegistry.h
+++ b/packages/react-native/React/Fabric/RCTSurfaceRegistry.h
@@ -13,7 +13,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class RCTFabricSurface;
 
-typedef void (^RCTSurfaceEnumeratorBlock)(NSEnumerator<RCTFabricSurface *> *enumerator);
+using RCTSurfaceEnumeratorBlock = void (^)(NSEnumerator<RCTFabricSurface *> *_Nonnull __strong);
 
 /**
  * Registry of Surfaces.