diff --git a/src/libraries/NetCoreAppLibrary.props b/src/libraries/NetCoreAppLibrary.props
index 2b0f1a0f2e51d..a3f63978bf92d 100644
--- a/src/libraries/NetCoreAppLibrary.props
+++ b/src/libraries/NetCoreAppLibrary.props
@@ -232,6 +232,7 @@
       System.Diagnostics.EventLog;
       System.Diagnostics.PerformanceCounter;
       System.DirectoryServices;
+      System.Formats.Nrbf;
       System.IO.Packaging;
       System.Resources.Extensions;
       System.Security.Cryptography.Pkcs;