diff --git a/resources/schema/inventory.xsd b/resources/schema/inventory.xsd
index 7c9b561..60fdcb5 100644
--- a/resources/schema/inventory.xsd
+++ b/resources/schema/inventory.xsd
@@ -185,6 +185,7 @@
     <xsd:simpleContent>
       <xsd:extension base="xsd:string">
         <xsd:attribute name="lexical_unit_lexeme_id" type="xsd:int"/>
+        <xsd:attribute name="lexeme_id" type="xsd:int"/>
         <xsd:attribute name="role" use="required">
           <xsd:simpleType>
             <xsd:restriction base="xsd:string">