diff --git a/103280/TS_103_280.xsd b/103280/TS_103_280.xsd
index ce66ea6e07a51b9b1870ce32eb95d2c09eba3720..a6ec0770c1a9acc297ee56f6ecf206a499d32a35 100644
--- a/103280/TS_103_280.xsd
+++ b/103280/TS_103_280.xsd
@@ -241,4 +241,9 @@
             <xs:pattern value=".+@.+"/>
         </xs:restriction>
     </xs:simpleType>
+        <xs:simpleType name="EUI64">
+        <xs:restriction base="xs:token">
+            <xs:pattern value="([a-f0-9]{2}:){7}[a-f0-9]{2}"/>
+        </xs:restriction>
+    </xs:simpleType>
 </xs:schema>
\ No newline at end of file