diff --git a/web/pteropus-frame.js b/web/pteropus-frame.js
index 427f120..3f8538a 100644
--- a/web/pteropus-frame.js
+++ b/web/pteropus-frame.js
@@ -7,8 +7,9 @@ function fileDragOverHandler(event) {
 async function run() {
     await init();
 
+    let pteropus;
     try {
-        let pteropus = await init_pteropus();
+        pteropus = await init_pteropus();
     } catch(e) {
         const errorParagraph = document.createElement("p");
         if(e instanceof PteropusInitError) {