diff --git a/.gitignore b/.gitignore
index 76bfa72b49d..eb045368b7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,9 +32,12 @@
 /vendor/debian_jessie_arm-sysroot/
 /vendor/debian_jessie_arm64-sysroot/
 /vendor/debian_jessie_i386-sysroot/
+/vendor/debian_jessie_mips64-sysroot/
 /vendor/debian_wheezy_amd64-sysroot/
 /vendor/debian_wheezy_arm-sysroot/
 /vendor/debian_wheezy_i386-sysroot/
+/vendor/gcc-4.8.3-d197-n64-loongson/
+/vendor/readme-gcc483-loongson.txt
 /vendor/download/
 /vendor/llvm-build/
 /vendor/llvm/
diff --git a/script/bootstrap.py b/script/bootstrap.py
index 9345bd8ac5f..f7183d866bf 100755
--- a/script/bootstrap.py
+++ b/script/bootstrap.py
@@ -7,10 +7,11 @@ import re
 import subprocess
 import sys
 
-from lib.config import BASE_URL, PLATFORM,  enable_verbose_mode, \
+from lib.config import BASE_URL, PLATFORM, MIPS64EL_SYSROOT_URL, \
+                       MIPS64EL_GCC, MIPS64EL_GCC_URL, enable_verbose_mode, \
                        is_verbose_mode, get_target_arch
 from lib.util import execute, execute_stdout, get_electron_version, \
-                     scoped_cwd, update_node_modules
+                     scoped_cwd, download, update_node_modules
 
 
 SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
@@ -18,7 +19,6 @@ VENDOR_DIR = os.path.join(SOURCE_ROOT, 'vendor')
 DOWNLOAD_DIR = os.path.join(VENDOR_DIR, 'download')
 PYTHON_26_URL = 'https://chromium.googlesource.com/chromium/deps/python_26'
 
-
 def main():
   os.chdir(SOURCE_ROOT)
 
@@ -37,6 +37,9 @@ def main():
   libcc_shared_library_path = args.libcc_shared_library_path
   libcc_static_library_path = args.libcc_static_library_path
 
+  if args.target_arch == 'mips64el':
+    download_mips64el_toolchain()
+
   # Redirect to use local libchromiumcontent build.
   if args.build_release_libcc or args.build_debug_libcc:
     build_libchromiumcontent(args.verbose, args.target_arch, defines,
@@ -57,7 +60,7 @@ def main():
                            libcc_source_path, libcc_shared_library_path,
                            libcc_static_library_path)
 
-  if PLATFORM == 'linux':
+  if PLATFORM == 'linux' and args.target_arch != 'mips64el':
     download_sysroot(args.target_arch)
 
   create_chrome_version_h()
@@ -198,6 +201,23 @@ def download_sysroot(target_arch):
                   '--arch', target_arch],
                   cwd=VENDOR_DIR)
 
+
+def download_mips64el_toolchain():
+  # Download sysroot image.
+  if not os.path.exists(os.path.join(VENDOR_DIR, 'debian_jessie_mips64-sysroot')):
+    tar_name = 'debian_jessie_mips64-sysroot.tar.bz2'
+    download(tar_name, MIPS64EL_SYSROOT_URL,
+             os.path.join(SOURCE_ROOT, tar_name))
+    subprocess.call(['tar', '-jxf', tar_name, '-C', VENDOR_DIR])
+    os.remove(tar_name)
+  # Download toolchain.
+  if not os.path.exists(os.path.join(VENDOR_DIR, MIPS64EL_GCC)):
+    tar_name = MIPS64EL_GCC + '.tar.gz'
+    download(tar_name, MIPS64EL_GCC_URL, os.path.join(SOURCE_ROOT, tar_name))
+    subprocess.check_call(['tar', '-xf', tar_name, '-C', VENDOR_DIR])
+    os.remove(tar_name)
+
+
 def create_chrome_version_h():
   version_file = os.path.join(VENDOR_DIR, 'libchromiumcontent', 'VERSION')
   target_file = os.path.join(SOURCE_ROOT, 'atom', 'common', 'chrome_version.h')
diff --git a/script/lib/config.py b/script/lib/config.py
index 58f467b5b64..93056665cea 100644
--- a/script/lib/config.py
+++ b/script/lib/config.py
@@ -5,6 +5,11 @@ import os
 import platform
 import sys
 
+# URL to the mips64el sysroot image.
+MIPS64EL_SYSROOT_URL = 'https://github.com/electron/debian-sysroot-image-creator/releases/download/v0.5.0/debian_jessie_mips64-sysroot.tar.bz2'
+# URL to the mips64el toolchain.
+MIPS64EL_GCC = 'gcc-4.8.3-d197-n64-loongson'
+MIPS64EL_GCC_URL = 'http://ftp.loongnix.org/toolchain/gcc/release/' + MIPS64EL_GCC + '.tar.gz'
 
 BASE_URL = os.getenv('LIBCHROMIUMCONTENT_MIRROR') or \
     'https://s3.amazonaws.com/github-janky-artifacts/libchromiumcontent'