diff --git a/releasenotes/notes/port-0-is-valid-d7188af3be6f3ecb.yaml b/releasenotes/notes/port-0-is-valid-d7188af3be6f3ecb.yaml
new file mode 100644
index 0000000000..b13ae35056
--- /dev/null
+++ b/releasenotes/notes/port-0-is-valid-d7188af3be6f3ecb.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - Fixes the issue of port number 0 (zero) being considered invalid (`bug 1729628
+    <https://bugs.launchpad.net/ironic/+bug/1729628>`_). Zero is a valid port
+    number and is now recognized as such.