diff --git a/eng/DotNetBuild.props b/eng/DotNetBuild.props
index 3569781b9af498..ce13d6ca5b0022 100644
--- a/eng/DotNetBuild.props
+++ b/eng/DotNetBuild.props
@@ -88,7 +88,7 @@
 
       <!-- Handle system libraries -->
       <UseSystemLibs Condition="'$(UseSystemLibs)' != ''">+$(UseSystemLibs)+</UseSystemLibs>
-      <InnerBuildArgs Condition="$(UseSystemLibs.Contains('+brotli+'))">$(InnerBuildArgs) --cmakeargs -DCLR_CMAKE_USE_SYSTEM_BROTLI=true</InnerBuildArgs>
+      <InnerBuildArgs Condition="'$(PortableBuild)' != 'true'">$(InnerBuildArgs) --cmakeargs -DCLR_CMAKE_USE_SYSTEM_BROTLI=true</InnerBuildArgs>
       <InnerBuildArgs Condition="$(UseSystemLibs.Contains('+libunwind+'))">$(InnerBuildArgs) --cmakeargs -DCLR_CMAKE_USE_SYSTEM_LIBUNWIND=true</InnerBuildArgs>
       <!-- TODO: llvm-libunwind -->
       <!-- TODO: LinuxTracepoints -->
diff --git a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
index d5b7ade91d2110..efd3cfddaf2add 100644
--- a/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
+++ b/src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets
@@ -168,6 +168,11 @@ The .NET Foundation licenses this file to you under the MIT license.
       <NativeSystemLibrary Include="crypto" />
     </ItemGroup>
 
+    <ItemGroup Condition="'$(UseSystemBrotli)' != 'false' and Exists('$(IlcSdkPath)nonportable.txt')">
+      <NativeSystemLibrary Include="brotlienc" />
+      <NativeSystemLibrary Include="brotlidec" />
+    </ItemGroup>
+
     <ItemGroup Condition="'$(StaticOpenSslLinking)' == 'true' and '$(NativeLib)' != 'Static'">
       <NativeLibrary Include="$(IntermediateOutputPath)libs/System.Security.Cryptography.Native/build/libSystem.Security.Cryptography.Native.OpenSsl.a" />
       <DirectPInvoke Include="libSystem.Security.Cryptography.Native.OpenSsl" />