diff --git a/www/assets/js/track.js b/www/assets/js/track.js
index 29d61ad..253ba75 100644
--- a/www/assets/js/track.js
+++ b/www/assets/js/track.js
@@ -33,6 +33,9 @@ function openTrackingBarcodeScanner() {
         } else if (result.startsWith("http") && result.includes("#")) {
             if (coderegex.test(result.split("#")[1])) {
                 code = result.split("#")[1];
+            } else {
+                app.dialog.alert("This app can't understand what's in that barcode.", "Error");
+                return;
             }
         } else if (coderegex.test(result)) {
             code = result;