diff --git a/python/mozbuild/mozpack/mozjar.py b/python/mozbuild/mozpack/mozjar.py
index 2010a7f135..8a520736b8 100644
--- a/python/mozbuild/mozpack/mozjar.py
+++ b/python/mozbuild/mozpack/mozjar.py
@@ -809,7 +809,7 @@ class Brotli(object):
 
     @staticmethod
     def compress(data):
-        return Brotli.run_brotli_tool(['--lgwin=17'], data)
+        return Brotli.run_brotli_tool(['--lgwin=0'], data)
 
     @staticmethod
     def decompress(data):