diff --git a/ansible/roles/gitea-runner/tasks/deregister.yml b/ansible/roles/gitea-runner/tasks/deregister.yml
index d846667..51de648 100644
--- a/ansible/roles/gitea-runner/tasks/deregister.yml
+++ b/ansible/roles/gitea-runner/tasks/deregister.yml
@@ -30,8 +30,8 @@
   become: true
   become_user: "{{ gitea_runner_service_user }}"
   environment:
-    XDG_RUNTIME_DIR: "/run/user/{{ gitea_runner_uid }}"
-    DOCKER_HOST: "unix:///run/user/{{ gitea_runner_uid }}/docker.sock"
+    XDG_RUNTIME_DIR: "/run/user/{{ gitea_runner_uid | default(0) }}"
+    DOCKER_HOST: "unix:///run/user/{{ gitea_runner_uid | default(0) }}/docker.sock"
   when:
     - runner_file_stat.stat.exists | default(false) | bool
     - not skip_runner_registration
diff --git a/ansible/roles/gitea-runner/tasks/register.yml b/ansible/roles/gitea-runner/tasks/register.yml
index 427549e..470e8c4 100644
--- a/ansible/roles/gitea-runner/tasks/register.yml
+++ b/ansible/roles/gitea-runner/tasks/register.yml
@@ -25,8 +25,8 @@
   become: true
   become_user: "{{ gitea_runner_service_user }}"
   environment:
-    XDG_RUNTIME_DIR: "/run/user/{{ gitea_runner_uid }}"
-    DOCKER_HOST: "unix:///run/user/{{ gitea_runner_uid }}/docker.sock"
+    XDG_RUNTIME_DIR: "/run/user/{{ gitea_runner_uid | default(0) }}"
+    DOCKER_HOST: "unix:///run/user/{{ gitea_runner_uid | default(0) }}/docker.sock"
   when: not runner_registered.stat.exists
   register: register_output
   changed_when: "'already exists' not in register_output.stdout | default('')"