diff --git a/src/libs/ifc/schema/pattern/v0.6.5.xsd b/src/libs/ifc/schema/pattern/v0.6.5.xsd
index dccf68578..1c9f8b187 100644
--- a/src/libs/ifc/schema/pattern/v0.6.5.xsd
+++ b/src/libs/ifc/schema/pattern/v0.6.5.xsd
@@ -981,7 +981,7 @@
   <xs:simpleType name="userMaterialType">
     <xs:restriction base="xs:unsignedInt">
       <xs:minInclusive value="1"/>
-      <xs:maxInclusive value="9"/>
+      <xs:maxInclusive value="20"/>
     </xs:restriction>
   </xs:simpleType>
 </xs:schema>