diff --git a/src/kits/package/FetchFileJob.cpp b/src/kits/package/FetchFileJob.cpp
index 0256ef3338..5b10ce1566 100644
--- a/src/kits/package/FetchFileJob.cpp
+++ b/src/kits/package/FetchFileJob.cpp
@@ -140,8 +140,8 @@ FetchFileJob::DataReceived(BUrlRequest*, const char* data, off_t position,
 
 
 void
-FetchFileJob::DownloadProgress(BUrlRequest*, ssize_t bytesReceived,
-	ssize_t bytesTotal)
+FetchFileJob::DownloadProgress(BUrlRequest*, off_t bytesReceived,
+	off_t bytesTotal)
 {
 	if (bytesTotal != 0) {
 		fBytes = bytesReceived;
diff --git a/src/kits/package/FetchFileJob.h b/src/kits/package/FetchFileJob.h
index 1105050c10..28d0ce5d0a 100644
--- a/src/kits/package/FetchFileJob.h
+++ b/src/kits/package/FetchFileJob.h
@@ -54,7 +54,7 @@ public:
 	virtual void	DataReceived(BUrlRequest*, const char* data,
 						off_t position, ssize_t size);
 	virtual void	DownloadProgress(BUrlRequest*,
-						ssize_t bytesReceived, ssize_t bytesTotal);
+						off_t bytesReceived, off_t bytesTotal);
 	virtual void 	RequestCompleted(BUrlRequest* request,
 						bool success);
 #endif