diff --git a/.github/workflows/quarto-docs.yml b/.github/workflows/quarto-docs.yml
index a4dfb9d76..2b74a334f 100644
--- a/.github/workflows/quarto-docs.yml
+++ b/.github/workflows/quarto-docs.yml
@@ -11,6 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+    # Don't run in forks, unless the forker sets a secret variable. I chose to
+    # use a secret rather than a var because secrets are not copied to forks.
+    if: github.event.repository.fork == false || secrets.ALLOW_FORK_DEPLOY == 'true'
     steps:
       - name: Check out repository
         uses: actions/checkout@v4