diff --git a/source/vocab/concepts.ttl b/source/vocab/concepts.ttl
index ace9283a2..a1b05f9a7 100644
--- a/source/vocab/concepts.ttl
+++ b/source/vocab/concepts.ttl
@@ -117,7 +117,7 @@
     owl:equivalentProperty skos:definition ;
     owl:equivalentProperty madsrdf:definitionNote .
 
-:exactMatch a owl:ObjectProperty ;
+:exactMatch a owl:ObjectProperty, owl:SymmetricProperty ;
     :category :integral ;
     rdfs:label "exact match"@en, "exakt match"@sv ;
     sdo:domainIncludes :Identity ;