diff --git a/.github/workflows/netsim.yml b/.github/workflows/netsim.yml
index 06a7322ed6..5f92b7626f 100644
--- a/.github/workflows/netsim.yml
+++ b/.github/workflows/netsim.yml
@@ -44,6 +44,7 @@ jobs:
       if: github.event_name == 'issue_comment'
       uses: actions/checkout@master
       with:
+        repository: ${{ github.event.issue.repository.full_name }}
         submodules: recursive
         ref: ${{ steps.refs.outputs.head_ref }}