diff --git a/pkgs/development/python-modules/flask-compress/default.nix b/pkgs/development/python-modules/flask-compress/default.nix
index b9c73d7048e..cf9abdc596a 100644
--- a/pkgs/development/python-modules/flask-compress/default.nix
+++ b/pkgs/development/python-modules/flask-compress/default.nix
@@ -1,4 +1,6 @@
-{ stdenv, fetchPypi, buildPythonPackage, flask }:
+{ stdenv, fetchPypi, buildPythonPackage, flask
+, brotli
+}:
 
 buildPythonPackage rec {
   version = "1.5.0";
@@ -9,7 +11,7 @@ buildPythonPackage rec {
     sha256 = "f367b2b46003dd62be34f7fb1379938032656dca56377a9bc90e7188e4289a7c";
   };
 
-  propagatedBuildInputs = [ flask ];
+  propagatedBuildInputs = [ flask brotli ];
 
   meta = with stdenv.lib; {
     description = "Compress responses in your Flask app with gzip";