diff --git a/src/web/LoaderWorker.js b/src/web/LoaderWorker.js
index bcb68829..bda4e667 100644
--- a/src/web/LoaderWorker.js
+++ b/src/web/LoaderWorker.js
@@ -47,7 +47,7 @@ self.loadFile = function(file) {
     };
 
     reader.onerror = function(e) {
-        self.postMessage({"error": file.error.message});
+        self.postMessage({"error": reader.error.message});
     };
 
     seek();