diff --git a/.ng-dev/config.ts b/.ng-dev/config.ts
index 6350332d5e..359304fadb 100644
--- a/.ng-dev/config.ts
+++ b/.ng-dev/config.ts
@@ -56,8 +56,6 @@ const format = {
       // TODO: burn down format failures and remove aio and integration exceptions.
       '!aio/**',
       '!integration/**',
-      // TODO: remove this exclusion as part of IE deprecation.
-      '!shims_for_IE.js',
       // Both third_party and .yarn are directories containing copied code which should
       // not be modified.
       '!third_party/**',
diff --git a/BUILD.bazel b/BUILD.bazel
index 48e84cc328..73e67bea63 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -24,7 +24,7 @@ filegroup(
         "//packages/zone.js/bundles:zone-testing.umd.js",
         "//packages/zone.js/bundles:task-tracking.umd.js",
         "//:test-events.js",
-        "//:shims_for_IE.js",
+        "//:third_party/shims_for_IE.js",
         # Including systemjs because it defines `__eval`, which produces correct stack traces.
         "@npm//:node_modules/systemjs/dist/system.src.js",
         "@npm//:node_modules/reflect-metadata/Reflect.js",
diff --git a/karma-js.conf.js b/karma-js.conf.js
index ce31b84a83..bdab6ea463 100644
--- a/karma-js.conf.js
+++ b/karma-js.conf.js
@@ -43,7 +43,7 @@ module.exports = function(config) {
 
       // Including systemjs because it defines `__eval`, which produces correct stack traces.
       'test-events.js',
-      'shims_for_IE.js',
+      'third_party/shims_for_IE.js',
       'node_modules/systemjs/dist/system.src.js',
 
       // Serve polyfills necessary for testing the `elements` package.
diff --git a/packages/router/karma.conf.js b/packages/router/karma.conf.js
index 038d8e2654..2b5cb9e95a 100644
--- a/packages/router/karma.conf.js
+++ b/packages/router/karma.conf.js
@@ -28,7 +28,7 @@ module.exports = function(config) {
       // Polyfills.
       'node_modules/core-js/client/core.js',
       'node_modules/reflect-metadata/Reflect.js',
-      'shims_for_IE.js',
+      'third_party/shims_for_IE.js',
 
       // System.js for module loading
       'node_modules/systemjs/dist/system-polyfills.js',
diff --git a/shims_for_IE.js b/third_party/shims_for_IE.js
similarity index 100%
rename from shims_for_IE.js
rename to third_party/shims_for_IE.js