diff --git a/ansible/container-image-build.yml b/ansible/container-image-build.yml
index 16e4f8071..026c5cec7 100644
--- a/ansible/container-image-build.yml
+++ b/ansible/container-image-build.yml
@@ -53,7 +53,7 @@
           kolla-build
           --config-dir {{ kolla_build_config_path }}
           --engine {{ container_engine }}
-          {% if kolla_docker_registry is not none %}--registry {{ kolla_docker_registry }}{% endif %}
+          {% if kolla_docker_registry %}--registry {{ kolla_docker_registry }}{% endif %}
           {% if push_images | bool %}--push{% endif %}
           {% if nocache | bool %}--nocache{% endif %}
           {% if kolla_base_arch != ansible_facts.architecture %}--platform {{ platform }}{% endif %}
diff --git a/releasenotes/notes/fix-empty-registry-bug.yaml b/releasenotes/notes/fix-empty-registry-bug.yaml
new file mode 100644
index 000000000..8efe04310
--- /dev/null
+++ b/releasenotes/notes/fix-empty-registry-bug.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fixes an issue building images with a regex when no image registry is set
+    `LP#2112646 <https://bugs.launchpad.net/kayobe/+bug/2112646>`__