diff --git a/lib/phlex/rails/unbuffered.rb b/lib/phlex/rails/unbuffered.rb
index 7f3fc8d..b3e1901 100644
--- a/lib/phlex/rails/unbuffered.rb
+++ b/lib/phlex/rails/unbuffered.rb
@@ -25,7 +25,7 @@ def method_missing(name, ...)
 						@object.public_send(name, *a, **k) do |*aa|
 							if aa.length == 1 && Phlex::SGML === aa[0]
 								@object.helpers.capture(
-									Phlex::Rails::Unbuffered.new(aa[0]),
+									::Phlex::Rails::Unbuffered.new(aa[0]),
 									&b
 								)
 							else