--- src/3rdparty/chromium/third_party/modp_b64/BUILD.gn.orig	2019-05-23 12:39:34 UTC
+++ src/3rdparty/chromium/third_party/modp_b64/BUILD.gn
@@ -2,10 +2,16 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/host_byteorder.gni")
+
 static_library("modp_b64") {
   sources = [
     "modp_b64.cc",
     "modp_b64.h",
     "modp_b64_data.h",
   ]
+
+  if (host_byteorder == "big") {
+    defines = [ "WORDS_BIGENDIAN=1" ]
+  }
 }