diff --git a/src/models/entities/Runner.ts b/src/models/entities/Runner.ts
index 87ef38d..8e5e79b 100644
--- a/src/models/entities/Runner.ts
+++ b/src/models/entities/Runner.ts
@@ -57,7 +57,10 @@ export class Runner extends Participant {
    * This is implemented here to avoid duplicate code in other files.
    */
   public get validScans(): Scan[] {
-    return this.scans.filter(scan => scan.valid == true);
+    if (this.scans) {
+      return this.scans.filter(scan => scan.valid == true);
+    }
+    return []
   }
 
   /**