diff --git a/shacl_eval.ttl b/shacl_eval.ttl
index 379c48b..92f3411 100644
--- a/shacl_eval.ttl
+++ b/shacl_eval.ttl
@@ -284,6 +284,13 @@ oquo:IssueShape
         sh:severity sh:Violation ;
     ] ;
     
+    sh:property [
+        sh:path ipo:hasAsset ;
+        sh:minCount 1 ;
+        sh:class ipo:Asset ;
+        sh:severity sh:Violation ;
+    ] ;
+    
     sh:property [
         sh:path rdfs:comment ;       
         sh:minCount 1 ;