diff --git a/src/components/GrampsjsFormEventRef.js b/src/components/GrampsjsFormEventRef.js
index a71105ea..1f86613b 100644
--- a/src/components/GrampsjsFormEventRef.js
+++ b/src/components/GrampsjsFormEventRef.js
@@ -37,6 +37,10 @@ class GrampsjsFormEventRef extends GrampsjsObjectForm {
       </grampsjs-form-select-type>
     `
   }
+
+  get isValid() {
+    return !!this.data.ref
+  }
 }
 
 window.customElements.define('grampsjs-form-eventref', GrampsjsFormEventRef)