diff --git a/lib/async/http/endpoint.rb b/lib/async/http/endpoint.rb
index fd31f132..aa148e62 100644
--- a/lib/async/http/endpoint.rb
+++ b/lib/async/http/endpoint.rb
@@ -125,7 +125,7 @@ def authority(ignore_default_port = true)
 			
 			# Return the path and query components of the given URL.
 			def path
-				buffer = @url.path || "/"
+				buffer = @url.path.dup || "/"
 				
 				if query = @url.query
 					buffer = "#{buffer}?#{query}"
@@ -230,4 +230,4 @@ def tcp_endpoint
 			end
 		end
 	end
-end
\ No newline at end of file
+end