diff --git a/material/assets/javascripts/bundle.4e3fea51.min.js b/material/assets/javascripts/bundle.4e3fea51.min.js
index a0a430c9f5c..ef167033928 100644
--- a/material/assets/javascripts/bundle.4e3fea51.min.js
+++ b/material/assets/javascripts/bundle.4e3fea51.min.js
@@ -28,5 +28,5 @@ LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 PERFORMANCE OF THIS SOFTWARE.
 ***************************************************************************** */
-//# sourceMappingURL=bundle.4e3fea51.min.js
+//# sourceMappingURL=bundle.4e3fea51.min.js.map
 
diff --git a/material/assets/javascripts/workers/search.f5903571.min.js b/material/assets/javascripts/workers/search.f5903571.min.js
index 8fc84e5c96c..41f69cd5ebd 100644
--- a/material/assets/javascripts/workers/search.f5903571.min.js
+++ b/material/assets/javascripts/workers/search.f5903571.min.js
@@ -57,5 +57,5 @@
  * Copyright (C) 2020 Oliver Nightingale
  * @license MIT
  */
-//# sourceMappingURL=search.f5903571.min.js
+//# sourceMappingURL=search.f5903571.min.js.map
 
diff --git a/material/overrides/assets/javascripts/bundle.a8da887a.min.js b/material/overrides/assets/javascripts/bundle.a8da887a.min.js
index 135c0f25349..ecf4562f8c4 100644
--- a/material/overrides/assets/javascripts/bundle.a8da887a.min.js
+++ b/material/overrides/assets/javascripts/bundle.a8da887a.min.js
@@ -15,5 +15,5 @@ LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 PERFORMANCE OF THIS SOFTWARE.
 ***************************************************************************** */
-//# sourceMappingURL=bundle.a8da887a.min.js
+//# sourceMappingURL=bundle.a8da887a.min.js.map
 
diff --git a/tools/build/transform/index.ts b/tools/build/transform/index.ts
index 4eb6b19bc2e..868cae795ae 100644
--- a/tools/build/transform/index.ts
+++ b/tools/build/transform/index.ts
@@ -183,7 +183,7 @@ export function transformScript(
             fs.writeFile(`${file}.map`, map),
             fs.writeFile(`${file}`, js.replace(
               /(sourceMappingURL=)(.*)/,
-              `$1${path.basename(file)}\n`
+              `$1${path.basename(file)}.map\n`
             )),
           ))
         )