diff --git a/.github/workflows/update-wpt.yml b/.github/workflows/update-wpt.yml
index 77861c0d7fc866..a7cdd07a093a2d 100644
--- a/.github/workflows/update-wpt.yml
+++ b/.github/workflows/update-wpt.yml
@@ -64,6 +64,8 @@ jobs:
             echo "long_version=$new_version"
             echo "short_version=${new_version:0:10}"
           } >> "$GITHUB_ENV"
+        env:
+          SUBSYSTEM: ${{ matrix.subsystem }}
 
       - name: Open or update PR for the subsystem update
         uses: gr2m/create-or-update-pull-request-action@77596e3166f328b24613f7082ab30bf2d93079d5