diff --git a/src/package/sign/sign.proj b/src/package/sign/sign.proj
index 65356c31eb..c70207f8ee 100644
--- a/src/package/sign/sign.proj
+++ b/src/package/sign/sign.proj
@@ -215,6 +215,7 @@
       <NetStandard20AssembliesToSign Include="$(ArtifactsNS20Directory)Microsoft.VisualStudio.TestPlatform.ObjectModel.dll" />
       <NetStandard20AssembliesToSign Include="$(ArtifactsNS20Directory)Microsoft.TestPlatform.AdapterUtilities.dll" />
 
+      <UAP100AssembliesToSign Include="$(ArtifactsUAP100Directory)Microsoft.VisualStudio.TestPlatform.ObjectModel.dll" />
       <UAP100AssembliesToSign Include="$(ArtifactsUAP100Directory)Microsoft.TestPlatform.AdapterUtilities.dll" />
       <UAP100AssembliesToSign Include="$(ArtifactsUAP100Directory)Microsoft.TestPlatform.CoreUtilities.dll" />
       <UAP100AssembliesToSign Include="$(ArtifactsUAP100Directory)Microsoft.TestPlatform.PlatformAbstractions.dll" />