diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index 151a373f3..428b2c3ef 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -17,5 +17,7 @@
 
     <!-- These are coming in via runtime but the source-build infra isn't able to automatically pick up the right intermediate. -->
     <UsagePattern IdentityGlob="Microsoft.NETCore.App.Crossgen2.linux-x64/*8.0.*" />
+
+    <UsagePattern IdentityGlob="System.Threading.Tasks.Dataflow/*8.0.0*" />
   </IgnorePatterns>
 </UsageData>