diff --git a/DEPS b/DEPS
index 0fddf9fe64..d23873d936 100644
--- a/DEPS
+++ b/DEPS
@@ -231,12 +231,23 @@ hooks = [
     'action': ['python', 'src/build/linux/sysroot_scripts/install-sysroot.py',
                '--arch=amd64'],
   },
+  {
+    # Case-insensitivity for the Win SDK. Must run before win_toolchain below.
+    'name': 'ciopfs_linux',
+    'pattern': '.',
+    'condition': 'checkout_win and host_os == "linux"',
+    'action': [ 'python',
+                'src/third_party/depot_tools/download_from_google_storage.py',
+                '--no_resume',
+                '--no_auth',
+                '--bucket', 'chromium-browser-clang/ciopfs',
+                '-s', 'src/build/ciopfs.sha1',
+    ]
+  },
   {
     # Update the Windows toolchain if necessary. Must run before 'clang' below.
     'name': 'win_toolchain',
     'pattern': '.',
-    # TODO(thakis): Put some condition here. Not just host_os == 'win', because
-    # we also need this for (mac|linux) -> win cross builds.
     'action': ['python', 'src/build/vs_toolchain.py', 'update'],
   },
   {