diff --git a/config/external/moz.build b/config/external/moz.build
index 775e1f2376b8..21923dee72f9 100644
--- a/config/external/moz.build
+++ b/config/external/moz.build
@@ -16,6 +16,9 @@ if CONFIG['MOZ_UPDATER']:
     if not CONFIG['MOZ_NATIVE_BZ2']:
         external_dirs += ['modules/libbz2']
 
+# There's no "native brotli" yet, but probably in the future...
+external_dirs += ['modules/brotli']
+
 if CONFIG['MOZ_VORBIS']:
     external_dirs += ['media/libvorbis']
 
diff --git a/modules/brotli/moz.build b/modules/brotli/moz.build
new file mode 100644
index 000000000000..de070fab467d
--- /dev/null
+++ b/modules/brotli/moz.build
@@ -0,0 +1,21 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+EXPORTS += [
+    'dec/decode.h',
+    'dec/streams.h',
+    'dec/types.h',
+]
+
+UNIFIED_SOURCES += [
+    'dec/bit_reader.c',
+    'dec/decode.c',
+    'dec/huffman.c',
+    'dec/safe_malloc.c',
+    'dec/streams.c',
+]
+
+Library('brotli')