diff --git a/zefie_wtvp_minisrv/app.js b/zefie_wtvp_minisrv/app.js
index 71216fcd..b4e1aa38 100644
--- a/zefie_wtvp_minisrv/app.js
+++ b/zefie_wtvp_minisrv/app.js
@@ -590,7 +590,7 @@ async function sendToClient(socket, headers_obj, data) {
     if (content_length >= 256) compression_type = wtvmime.shouldWeCompress(ssid_sessions[socket.ssid], headers_obj);
 
     // disk service hack before further processing :)
-    if (socket_sessions[socket.id].wtv_request_type == "download" && content_length < 0) {
+    if (socket_sessions[socket.id].wtv_request_type == "download" && content_length > 0) {
         if (headers_obj['Content-Type'] == "application/gzip") {
             var gunzipped = zlib.gunzipSync(data);
             headers_obj['wtv-checksum'] = CryptoJS.MD5(CryptoJS.lib.WordArray.create(gunzipped)).toString(CryptoJS.enc.Hex).toLowerCase();