diff --git a/usr.bin/ftp/fetch.c b/usr.bin/ftp/fetch.c
index c9b46402924..0c486af477e 100644
--- a/usr.bin/ftp/fetch.c
+++ b/usr.bin/ftp/fetch.c
@@ -356,7 +356,7 @@ url_get(origline, proxyenv)
 			goto improper;
 		else
 			*ep = '\0';
-		filesize = strtol(cp, &ep, 10);
+		filesize = strtoll(cp, &ep, 10);
 		if (filesize < 1 || *ep != '\0')
 			goto improper;
 	} else