diff --git a/entry_types/scrolled/app/helpers/pageflow_scrolled/webpack_public_path_helper.rb b/entry_types/scrolled/app/helpers/pageflow_scrolled/webpack_public_path_helper.rb
index 911ee21256..f68cdd1ca1 100644
--- a/entry_types/scrolled/app/helpers/pageflow_scrolled/webpack_public_path_helper.rb
+++ b/entry_types/scrolled/app/helpers/pageflow_scrolled/webpack_public_path_helper.rb
@@ -2,12 +2,17 @@ module PageflowScrolled
   # @api private
   module WebpackPublicPathHelper
     def scrolled_webpack_public_path_script_tag
-      content_tag(:script, WebpackPublicPathHelper.js_snippet.html_safe)
+      content_tag(:script, WebpackPublicPathHelper.js_snippet(request).html_safe)
     end
 
-    def self.js_snippet
-      asset_host = Rails.configuration.action_controller.asset_host
+    def self.js_snippet(request = nil)
+      config_host = Rails.configuration.action_controller.asset_host
       packs_dir = Webpacker.config.public_output_path.basename
+      asset_host = if config_host.respond_to?(:call)
+                     config_host.call(packs_dir, request)
+                   else
+                     config_host
+                   end
 
       "var __webpack_public_path__ = '#{asset_host}/#{packs_dir}/';"
     end
diff --git a/entry_types/scrolled/spec/helpers/pageflow_scrolled/webpack_public_path_helper_spec.rb b/entry_types/scrolled/spec/helpers/pageflow_scrolled/webpack_public_path_helper_spec.rb
index 7c838a8035..71d07afba6 100644
--- a/entry_types/scrolled/spec/helpers/pageflow_scrolled/webpack_public_path_helper_spec.rb
+++ b/entry_types/scrolled/spec/helpers/pageflow_scrolled/webpack_public_path_helper_spec.rb
@@ -11,6 +11,22 @@ module PageflowScrolled
                             visible: false,
                             text: "var __webpack_public_path__ = '/packs-test/';")
       end
+
+      it 'can deal with proc asset host' do
+        allow(Rails.configuration.action_controller).to receive(:asset_host)
+          .and_return(lambda do |source, request = nil, *_|
+                        '2' + source.to_s if request && source
+                      end)
+
+        html = helper.scrolled_webpack_public_path_script_tag
+
+        expect(html)
+          .to have_selector(
+            'script',
+            visible: false,
+            text: "var __webpack_public_path__ = '2packs-test/packs-test/';"
+          )
+      end
     end
   end
 end