--- /dev/null
+Borrowed from the curlftpfs_0.9.2-5 Debian package.
+
+CURLOPT_INFILESIZE does not support -1 arg. This fix bug #556012.
+--- curlftpfs-0.9.2/ftpfs.c.old 2009-12-13 14:12:25.000000000 +0100
++++ curlftpfs-0.9.2/ftpfs.c 2009-12-13 14:12:32.000000000 +0100
+@@ -503,7 +503,6 @@
+
+ curl_easy_setopt_or_die(fh->write_conn, CURLOPT_URL, fh->full_path);
+ curl_easy_setopt_or_die(fh->write_conn, CURLOPT_UPLOAD, 1);
+- curl_easy_setopt_or_die(fh->write_conn, CURLOPT_INFILESIZE, -1);
+ curl_easy_setopt_or_die(fh->write_conn, CURLOPT_READFUNCTION, write_data_bg);
+ curl_easy_setopt_or_die(fh->write_conn, CURLOPT_READDATA, fh);
+ curl_easy_setopt_or_die(fh->write_conn, CURLOPT_LOW_SPEED_LIMIT, 1);