diff --git a/lib/progress.c b/lib/progress.c
index 7a243306b3..f01919ff26 100644
--- a/lib/progress.c
+++ b/lib/progress.c
@@ -345,7 +345,7 @@ void Curl_pgrsStartNow(struct Curl_easy *data)
 CURLcode Curl_pgrs_deliver_inc(struct Curl_easy *data, size_t delta)
 {
   if(data->set.max_filesize &&
-     (data->progress.deliver + (curl_off_t)delta > data->set.max_filesize))
+     ((curl_off_t)delta > data->set.max_filesize - data->progress.deliver))
     return CURLE_FILESIZE_EXCEEDED;
   data->progress.deliver += delta;
   return CURLE_OK;