diff --git a/_includes/support.html b/_includes/support.html
index 7383f00d..2f215057 100644
--- a/_includes/support.html
+++ b/_includes/support.html
@@ -13,7 +13,7 @@ <h3 class="fw-bolder">Support Center</h3>
                         – Confucius.
                     </p>
                     <div class="input-group mb-2">
-                        <a href="{{ '/support' | relative_url }}">
+                        <a href="{{ site.root_baseurl }}/support">
                             <button class="btn btn-outline-light rounded-0"
                                     id="button-support"
                                     type="button"
diff --git a/scripts/readthedocs_build.sh b/scripts/readthedocs_build.sh
index 2dc9147c..6a7e959f 100644
--- a/scripts/readthedocs_build.sh
+++ b/scripts/readthedocs_build.sh
@@ -245,6 +245,8 @@ cd "${TMPDIR}"
 gem install bundle
 bundle install
 echo "baseurl: ${READTHEDOCS_VERSION}" > _config_rtd.yml
+# Shared root links need the preview prefix without consumer repository paths.
+echo "root_baseurl: /${READTHEDOCS_VERSION}" >> _config_rtd.yml
 echo "_config_rtd.yml:"
 cat _config_rtd.yml
 echo "_config_theme.yml:"