diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js
index 469e5c5e810a5..c73997f1dcef9 100644
--- a/packages/shared/ReactFeatureFlags.js
+++ b/packages/shared/ReactFeatureFlags.js
@@ -48,7 +48,7 @@ export const disableJavaScriptURLs = false;
 // Control this behavior with a flag to support 16.6 minor releases in the meanwhile.
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
 
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 
 // Experimental React Flare event system and event components support.
 export const enableDeprecatedFlareAPI = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.native-fb.js b/packages/shared/forks/ReactFeatureFlags.native-fb.js
index 3d6afec5e6e9c..c930e0ecc9be9 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-fb.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-fb.js
@@ -25,7 +25,7 @@ export const enableSuspenseServerRenderer = false;
 export const enableSelectiveHydration = false;
 export const enableChunksAPI = false;
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 export const enableSchedulerDebugging = false;
 export const debugRenderPhaseSideEffectsForStrictMode = true;
 export const disableJavaScriptURLs = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js
index c97153f3ae1d4..ee795fe1e03f0 100644
--- a/packages/shared/forks/ReactFeatureFlags.native-oss.js
+++ b/packages/shared/forks/ReactFeatureFlags.native-oss.js
@@ -24,7 +24,7 @@ export const enableChunksAPI = false;
 export const disableJavaScriptURLs = false;
 export const disableInputAttributeSyncing = false;
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 export const enableSchedulerDebugging = false;
 export const enableDeprecatedFlareAPI = false;
 export const enableFundamentalAPI = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.persistent.js b/packages/shared/forks/ReactFeatureFlags.persistent.js
index deeeeb12b07cf..db307747c1b62 100644
--- a/packages/shared/forks/ReactFeatureFlags.persistent.js
+++ b/packages/shared/forks/ReactFeatureFlags.persistent.js
@@ -24,7 +24,7 @@ export const enableChunksAPI = false;
 export const disableJavaScriptURLs = false;
 export const disableInputAttributeSyncing = false;
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 export const enableSchedulerDebugging = false;
 export const enableDeprecatedFlareAPI = false;
 export const enableFundamentalAPI = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
index adc9ab91061c2..5d8263c720890 100644
--- a/packages/shared/forks/ReactFeatureFlags.test-renderer.js
+++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.js
@@ -24,7 +24,7 @@ export const enableChunksAPI = false;
 export const disableJavaScriptURLs = false;
 export const disableInputAttributeSyncing = false;
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 export const enableSchedulerDebugging = false;
 export const enableDeprecatedFlareAPI = false;
 export const enableFundamentalAPI = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.testing.js b/packages/shared/forks/ReactFeatureFlags.testing.js
index 4bcf3cc5b7914..13fcc7e198011 100644
--- a/packages/shared/forks/ReactFeatureFlags.testing.js
+++ b/packages/shared/forks/ReactFeatureFlags.testing.js
@@ -24,7 +24,7 @@ export const enableChunksAPI = false;
 export const disableJavaScriptURLs = false;
 export const disableInputAttributeSyncing = false;
 export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
-export const warnAboutShorthandPropertyCollision = false;
+export const warnAboutShorthandPropertyCollision = true;
 export const enableSchedulerDebugging = false;
 export const enableDeprecatedFlareAPI = false;
 export const enableFundamentalAPI = false;
diff --git a/packages/shared/forks/ReactFeatureFlags.www.js b/packages/shared/forks/ReactFeatureFlags.www.js
index 7cc5a9ae1c71a..74f346b017b52 100644
--- a/packages/shared/forks/ReactFeatureFlags.www.js
+++ b/packages/shared/forks/ReactFeatureFlags.www.js
@@ -16,6 +16,7 @@ export const {
   disableInputAttributeSyncing,
   enableTrustedTypesIntegration,
   deferPassiveEffectCleanupDuringUnmount,
+  warnAboutShorthandPropertyCollision,
 } = require('ReactFeatureFlags');
 
 // In www, we have experimental support for gathering data
@@ -32,7 +33,6 @@ export const enableSchedulerDebugging = true;
 
 export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
 export const warnAboutDeprecatedLifecycles = true;
-export const warnAboutShorthandPropertyCollision = false;
 export const disableLegacyContext = false;
 export const warnAboutStringRefs = false;
 export const warnAboutDefaultPropsOnFunctionComponents = false;