diff --git a/app/controllers/static_controller.rb b/app/controllers/static_controller.rb
index ded832cb47b..c1e18eed909 100644
--- a/app/controllers/static_controller.rb
+++ b/app/controllers/static_controller.rb
@@ -206,7 +206,7 @@ class StaticController < ApplicationController
         content = Rails.application.assets_manifest.find_sources('service-worker.js').first
         content = content.sub(
           /^\/\/# sourceMappingURL=(service-worker-.+\.map)$/
-        ) { "//# sourceMappingURL=#{helpers.script_asset_path(Regexp.last_match(1))}" }
+        ) { "//# sourceMappingURL=#{helpers.script_asset_path('service-worker')}.map" }
         render(
           plain: content,
           content_type: 'application/javascript'
diff --git a/spec/requests/static_controller_spec.rb b/spec/requests/static_controller_spec.rb
index 4f0a926626a..cbebd9f35fa 100644
--- a/spec/requests/static_controller_spec.rb
+++ b/spec/requests/static_controller_spec.rb
@@ -420,7 +420,7 @@ describe StaticController do
       get "/service-worker.js"
       expect(response.status).to eq(200)
       expect(response.content_type).to start_with("application/javascript")
-      expect(response.body).to include("sourceMappingURL=/assets/service-worker-abcde.js.map")
+      expect(response.body).to include("sourceMappingURL=/assets/service-worker.js.map\n")
     end
   end
 end