diff --git a/app/src/asset/index.ts b/app/src/asset/index.ts
index 506623ef3..d0cc99e5e 100644
--- a/app/src/asset/index.ts
+++ b/app/src/asset/index.ts
@@ -73,7 +73,9 @@ export class Asset extends Model {
         /// #if !MOBILE
         if (typeof pdfId === "string") {
             this.getPdfId(() => {
-                onPageNumberChanged({value: this.pdfPage, pdfInstance: this.pdfObject, id: this.pdfId});
+                if (this.pdfPage) {
+                    onPageNumberChanged({value: this.pdfPage, pdfInstance: this.pdfObject, id: this.pdfId});
+                }
             });
             return;
         }