diff --git a/middleman-cli/lib/middleman-cli/build.rb b/middleman-cli/lib/middleman-cli/build.rb
index 80916a02..60538431 100644
--- a/middleman-cli/lib/middleman-cli/build.rb
+++ b/middleman-cli/lib/middleman-cli/build.rb
@@ -254,7 +254,7 @@ module Middleman::Cli
         FileUtils.cp(resource.source_file, output_file)
       else
         begin
-          response = @rack.get(URI.escape(resource.destination_path))
+          response = @rack.get(URI.escape(resource.request_path))
 
           if response.status == 200
             base.create_file(output_file, binary_encode(response.body))
diff --git a/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb b/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
index 18bc996e..b89ec083 100644
--- a/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
+++ b/middleman-core/lib/middleman-core/sitemap/extensions/request_endpoints.rb
@@ -49,12 +49,13 @@ module Middleman
       class EndpointResource < ::Middleman::Sitemap::Resource
         attr_accessor :output
 
-        def initialize(store, path, source_file)
-          @request_path = ::Middleman::Util.normalize_path(source_file)
-
+        def initialize(store, path, request_path)
           super(store, path)
+          @request_path = ::Middleman::Util.normalize_path(request_path)
         end
 
+        attr_reader :request_path
+
         def template?
           true
         end
diff --git a/middleman-core/lib/middleman-core/sitemap/resource.rb b/middleman-core/lib/middleman-core/sitemap/resource.rb
index 16ac10f0..62551ad5 100644
--- a/middleman-core/lib/middleman-core/sitemap/resource.rb
+++ b/middleman-core/lib/middleman-core/sitemap/resource.rb
@@ -20,6 +20,11 @@ module Middleman
       # @return [String]
       attr_accessor :destination_path
 
+      # The path to use when requesting this resource. Normally it's
+      # the same as {#destination_path} but it can be overridden in subclasses.
+      # @return [String]
+      alias_method :request_path, :destination_path
+
       # Set the on-disk source file for this resource
       # @return [String]
       def source_file