diff --git a/lib/tesla/middleware/compression.ex b/lib/tesla/middleware/compression.ex
index c2cb24ad..3d9ba7f2 100644
--- a/lib/tesla/middleware/compression.ex
+++ b/lib/tesla/middleware/compression.ex
@@ -61,8 +61,17 @@ defmodule Tesla.Middleware.Compression do
   def decompress({:error, reason}), do: {:error, reason}
 
   def decompress(env) do
+    body = decompress_body(env.body, Tesla.get_header(env, "content-encoding"))
+
+    content_length =
+      body
+      |> byte_size()
+      |> to_string()
+
     env
-    |> Tesla.put_body(decompress_body(env.body, Tesla.get_header(env, "content-encoding")))
+    |> Tesla.put_body(body)
+    |> Tesla.delete_header("content-encoding")
+    |> Tesla.put_header("content-length", content_length)
   end
 
   defp decompress_body(<<31, 139, 8, _::binary>> = body, "gzip"), do: :zlib.gunzip(body)