diff --git a/src/coreclr/jit/fgopt.cpp b/src/coreclr/jit/fgopt.cpp
index 0ac687cd734153..547688a959c4da 100644
--- a/src/coreclr/jit/fgopt.cpp
+++ b/src/coreclr/jit/fgopt.cpp
@@ -5583,8 +5583,18 @@ bool Compiler::gtTreeContainsAsyncCall(GenTree* tree)
         return false;
     }
 
-    auto isAsyncCall = [](GenTree* tree) {
-        return tree->IsCall() && tree->AsCall()->IsAsync();
+    auto isAsyncCall = [=](GenTree* tree) {
+        if (tree->IsCall() && tree->AsCall()->IsAsync())
+        {
+            return true;
+        }
+
+        if (tree->OperIs(GT_RET_EXPR) && gtTreeContainsAsyncCall(tree->AsRetExpr()->gtInlineCandidate))
+        {
+            return true;
+        }
+
+        return false;
     };
 
     return gtFindNodeInTree<GTF_CALL>(tree, isAsyncCall) != nullptr;
diff --git a/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj b/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj
index bc3aaef2046d2f..0e20f7f99303c0 100644
--- a/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj
+++ b/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj
@@ -1,4 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Features>$(Features);runtime-async=on</Features>
+  </PropertyGroup>
+
   <PropertyGroup>
     <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
   </PropertyGroup>
diff --git a/src/libraries/Directory.Build.props b/src/libraries/Directory.Build.props
index 46da7b2e28340f..73e36cf5b0035b 100644
--- a/src/libraries/Directory.Build.props
+++ b/src/libraries/Directory.Build.props
@@ -99,4 +99,9 @@
     <CoverageIncludeDirectory Include="shared\Microsoft.NETCore.App\$(ProductVersion)" />
   </ItemGroup>
 
+  <PropertyGroup Condition="'$(UseNativeAotCoreLib)' == 'true'">
+    <Features>$(Features);runtime-async=on</Features>
+    <NoWarn>$(NoWarn);xUnit1013;CS1998;SYSLIB5007</NoWarn>
+  </PropertyGroup>
+
 </Project>