diff --git a/openstack_releases/cmds/validate.py b/openstack_releases/cmds/validate.py
index a2200a363e..90e81045d7 100644
--- a/openstack_releases/cmds/validate.py
+++ b/openstack_releases/cmds/validate.py
@@ -1197,9 +1197,9 @@ def validate_version_numbers(deliv, context):
                 context.error(
                     "LAST tag {} should match branch name (e.g {}-last)".format(
                         release.version, deliv.series))
-            if not deliv.series_info.is_em:
+            if not (deliv.series_info.is_em or deliv.series_info.is_eom):
                 context.error(
-                    "LAST tag {} aren't allowed on a series ({}) that are not EM".format(
+                    "LAST tag {} aren't allowed on a series ({}) that are not EM or Unmaintained".format(
                         release.version, deliv.series))
             continue
 
diff --git a/openstack_releases/series_status.py b/openstack_releases/series_status.py
index 79e3212527..14b236d236 100644
--- a/openstack_releases/series_status.py
+++ b/openstack_releases/series_status.py
@@ -55,6 +55,10 @@ class Series(object):
     def is_em(self):
         return self.status == 'extended maintenance'
 
+    @property
+    def is_eom(self):
+        return self.status == 'unmaintained'
+
     @property
     def is_maintained(self):
         return self.status == 'maintained' or self.status == 'development'