diff --git a/eng/pipelines/mono/templates/build-job.yml b/eng/pipelines/mono/templates/build-job.yml
index e554e749a1c83c..6b3f927b1b1e0a 100644
--- a/eng/pipelines/mono/templates/build-job.yml
+++ b/eng/pipelines/mono/templates/build-job.yml
@@ -53,6 +53,8 @@ jobs:
       value: ${{ parameters.osSubgroup }}
     - name: officialBuildIdArg
       value: ''
+    - name: osOverride
+      value: ''
     # Strip symbols only on the release build
     - ${{ if eq(parameters.buildConfig, 'Release') }}:
       - name: stripSymbolsArg