diff --git a/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
index 34eaf7557a6e46..5832d715d63d67 100644
--- a/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -44,7 +44,7 @@
     <!-- https://github.com/dotnet/dotnet/issues/5640 -->
     <NoWarn>$(NoWarn);CS9368</NoWarn>
     <Nullable>enable</Nullable>
-    <Features>$(Features);runtime-async=on</Features>
+    <Features>$(Features);runtime-async=on;updated-memory-safety-rules</Features>
 
     <!-- Ignore all previous constants since SPCL is sensitive to what is defined and the Sdk adds some by default -->
     <DefineConstants>CORECLR;NETCOREAPP;SYSTEM_PRIVATE_CORELIB</DefineConstants>