diff --git a/spec/type_aliases/mountdevice_spec.rb b/spec/type_aliases/mountdevice_spec.rb
index 5c1362fc..84d55e78 100644
--- a/spec/type_aliases/mountdevice_spec.rb
+++ b/spec/type_aliases/mountdevice_spec.rb
@@ -7,7 +7,9 @@ describe 'Swift::MountDevice' do
         '/dev',
         '/dev/sda',
         '/opt/swift/diskfile',
-        'LABEL=foo'
+        'LABEL=foo',
+        '50e68500-9920-4ffa-a4cd-34fd2a893530',
+        'UUID=50e68500-9920-4ffa-a4cd-34fd2a893530',
       ].each do |value|
         it { is_expected.to allow_value(value) }
       end
@@ -24,7 +26,13 @@ describe 'Swift::MountDevice' do
         'dev',
         'dev/sda',
         'LABEL=',
-        'LABELfoo'
+        'LABELfoo',
+        '50e6850099204ffaa4cd34fd2a893530',
+        '50e68500-9920-3ffa-a4cd-34fd2a893530',
+        'UUID=',
+        'UUID=foo',
+        'UUID=50e6850099204ffaa4cd34fd2a893530',
+        'UUID=50e68500-9920-3ffa-a4cd-34fd2a893530',
       ].each do |value|
         it { is_expected.not_to allow_value(value) }
       end
diff --git a/types/mountdevice.pp b/types/mountdevice.pp
index 41642d6d..67ac4575 100644
--- a/types/mountdevice.pp
+++ b/types/mountdevice.pp
@@ -1,4 +1,6 @@
 type Swift::MountDevice = Variant[
   Stdlib::Absolutepath,
-  Pattern[/^LABEL=.+$/]
+  Pattern[/^LABEL=.+$/],
+  Pattern[/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$/],
+  Pattern[/^UUID=[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$/],
 ]