diff --git a/public/vocab/struct/diglib.rdf b/public/vocab/struct/diglib.rdf
index 49c2a9c80c5c19ff1d094c258ab12a62c80cda7b..7e7d447b0a3cdc19ff328d80706e44dce6490ed2 100644
--- a/public/vocab/struct/diglib.rdf
+++ b/public/vocab/struct/diglib.rdf
@@ -241,4 +241,8 @@
     <skos:prefLabel xml:lang="de">Titel</skos:prefLabel>
     <skos:inScheme rdf:resource="http://uri.hab.de/vocab/struct/diglib"/>
   </skos:Concept>
+  <skos:Concept rdf:about="http://uri.hab.de/vocab/struct/diglib#P0013">
+    <skos:prefLabel xml:lang="de">Normalisierte Signatur</skos:prefLabel>
+    <skos:inScheme rdf:resource="http://uri.hab.de/vocab/struct/diglib"/>
+  </skos:Concept>
 </rdf:RDF>