diff --git a/library/server/wsf/router/wsf_routed_service.e b/library/server/wsf/router/wsf_routed_service.e
index 7526088a..d205f770 100644
--- a/library/server/wsf/router/wsf_routed_service.e
+++ b/library/server/wsf/router/wsf_routed_service.e
@@ -50,7 +50,6 @@ feature -- Execution
 			end
 		ensure
 			response_status_is_set: res.status_is_set
-			header_sent: res.header_committed
 		end
 
 	execute_default (req: WSF_REQUEST; res: WSF_RESPONSE)