diff --git a/app/src/main/java/com/wbrawner/skerge/ScannerService.kt b/app/src/main/java/com/wbrawner/skerge/ScannerService.kt
index 41ad21b..76b519d 100644
--- a/app/src/main/java/com/wbrawner/skerge/ScannerService.kt
+++ b/app/src/main/java/com/wbrawner/skerge/ScannerService.kt
@@ -81,7 +81,7 @@ class HpScannerService(
             }
         ) {
             onDownload { bytesSentTotal, contentLength ->
-                onProgress(bytesSentTotal, contentLength)
+                onProgress(bytesSentTotal, contentLength?: 0L)
             }
         }
         val responseBody: ByteArray = httpResponse.body()