diff --git a/changelog.d/content-length.fix b/changelog.d/content-length.fix
new file mode 100644
index 000000000..dee906a9d
--- /dev/null
+++ b/changelog.d/content-length.fix
@@ -0,0 +1 @@
+MediaProxy was setting the content-length header which is not permitted by RFC9112§6.2 when we are chunking the reply as it conflicts with the existence of the transfer-encoding header.
diff --git a/lib/pleroma/reverse_proxy.ex b/lib/pleroma/reverse_proxy.ex
index cc4530010..4d13e51fc 100644
--- a/lib/pleroma/reverse_proxy.ex
+++ b/lib/pleroma/reverse_proxy.ex
@@ -8,7 +8,7 @@ defmodule Pleroma.ReverseProxy do
                       ~w(if-unmodified-since if-none-match) ++ @range_headers
   @resp_cache_headers ~w(etag date last-modified)
   @keep_resp_headers @resp_cache_headers ++
-                       ~w(content-length content-type content-disposition content-encoding) ++
+                       ~w(content-type content-disposition content-encoding) ++
                        ~w(content-range accept-ranges vary)
   @default_cache_control_header "public, max-age=1209600"
   @valid_resp_codes [200, 206, 304]