diff --git a/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
index f594215810be6f..c44628dc2249c5 100644
--- a/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/coreclr/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -85,6 +85,7 @@
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)' == 'Release'">
     <Optimize Condition="'$(Optimize)' == ''">true</Optimize>
+    <Features>$(Features);runtime-async=on</Features>
   </PropertyGroup>
 
   <!-- Assembly attributes -->