diff --git a/filter_plugins/net_utils.py b/filter_plugins/net_utils.py
index 5eecace..cbde396 100644
--- a/filter_plugins/net_utils.py
+++ b/filter_plugins/net_utils.py
@@ -8,6 +8,7 @@ class FilterModule:
     def filters(self):
         return {
             "remove_domain_suffix": remove_domain_suffix,
+            "hostname": hostname,
             "ipaddr_sort": ipaddr_sort,
         }
 
@@ -17,6 +18,11 @@ def remove_domain_suffix(name):
     return parent.to_text()
 
 
+def hostname(fqdn):
+    name = dns.name.from_text(fqdn)
+    return name.relativize(name.parent()).to_text()
+
+
 def ipaddr_sort(addrs, types, unknown_after=True):
     check_types = {
         "global": attrgetter("is_global"),
diff --git a/roles/aruba/templates/config.j2 b/roles/aruba/templates/config.j2
index da146f0..5d67987 100644
--- a/roles/aruba/templates/config.j2
+++ b/roles/aruba/templates/config.j2
@@ -1,6 +1,6 @@
 {{ ansible_managed | comment(decoration="; ") }}
 
-hostname {{ aruba__hostname | truncate(32) | enquote }}
+hostname {{ aruba__hostname | hostname | truncate(32) | enquote }}
 
 include-credentials