diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 0cf168052..ecf9b8440 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -3108,6 +3108,7 @@ coturn_gid: "{{ matrix_user_gid }}"
 
 coturn_hostname: "{{ matrix_server_fqn_matrix }}"
 
+coturn_container_image_registry_prefix: "{{ 'localhost/' if coturn_container_image_self_build else coturn_container_image_registry_prefix_upstream }}"
 coturn_container_image_registry_prefix_upstream: "{{ matrix_container_global_registry_prefix_override if matrix_container_global_registry_prefix_override else coturn_container_image_registry_prefix_upstream_default }}"
 
 coturn_container_image_self_build: "{{ matrix_architecture not in ['amd64', 'arm32', 'arm64'] }}"
diff --git a/roles/custom/matrix-coturn/defaults/main.yml b/roles/custom/matrix-coturn/defaults/main.yml
index ee6749f00..dae7ec125 100644
--- a/roles/custom/matrix-coturn/defaults/main.yml
+++ b/roles/custom/matrix-coturn/defaults/main.yml
@@ -28,7 +28,6 @@ coturn_container_image_self_build_repo_dockerfile_path: "docker/coturn/alpine/Do
 # renovate: datasource=docker depName=coturn/coturn versioning=loose
 coturn_version: 4.8.0
 coturn_container_image: "{{ coturn_container_image_registry_prefix }}coturn/coturn:{{ coturn_version }}-alpine"
-coturn_container_image_registry_prefix: "{{ 'localhost/' if coturn_container_image_self_build else coturn_container_image_registry_prefix_upstream }}"
 coturn_container_image_registry_prefix_upstream: "{{ coturn_container_image_registry_prefix_upstream_default }}"
 coturn_container_image_registry_prefix_upstream_default: docker.io/
 coturn_container_image_force_pull: "{{ coturn_container_image.endswith(':latest') }}"