diff --git a/assets/runtime/config/gitlabhq/gitlab.yml b/assets/runtime/config/gitlabhq/gitlab.yml
index e8b07eaf..a8acc442 100644
--- a/assets/runtime/config/gitlabhq/gitlab.yml
+++ b/assets/runtime/config/gitlabhq/gitlab.yml
@@ -40,7 +40,7 @@ production: &base
 
     # WARNING: See config/application.rb under "Relative url support" for the list of
     # other files that need to be changed for relative url support
-    # relative_url_root: {{GITLAB_RELATIVE_URL_ROOT}}
+    relative_url_root: {{GITLAB_RELATIVE_URL_ROOT}}
 
     # Uncomment and customize if you can't use the default user to run GitLab (default: 'git')
     # user: git
diff --git a/assets/runtime/functions b/assets/runtime/functions
index ed59128f..a46b81d2 100644
--- a/assets/runtime/functions
+++ b/assets/runtime/functions
@@ -920,6 +920,7 @@ configure_gitlab() {
 
   exec_as_git sed -i 's|{{GITLAB_HOST}}|'"${GITLAB_HOST}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml
   exec_as_git sed -i 's|{{GITLAB_PORT}}|'"${GITLAB_PORT}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml
+  exec_as_git sed -i 's|{{GITLAB_RELATIVE_URL_ROOT}}|'"${GITLAB_RELATIVE_URL_ROOT}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml
   exec_as_git sed -i 's|{{GITLAB_HTTPS}}|'"${GITLAB_HTTPS}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml
   exec_as_git sed -i 's|{{GITLAB_MAX_SIZE}}|'"${GITLAB_MAX_SIZE}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml
   exec_as_git sed -i 's|{{GITLAB_SSH_HOST}}|'"${GITLAB_SSH_HOST}"'|' ${GITLAB_INSTALL_DIR}/config/gitlab.yml