diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index 5e21e0e8..5e317be6 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -2253,7 +2253,7 @@ class HttpCli(object):
         hrange = self.headers.get("range")
 
         # let's not support 206 with compression
-        if do_send and not is_compressed and hrange:
+        if do_send and not is_compressed and hrange and file_sz:
             try:
                 a, b = hrange.split("=", 1)[1].split("-")