diff --git a/src/campaign_server/campaign_server.hpp b/src/campaign_server/campaign_server.hpp
index 8be7419ccde..9f10adf07b8 100644
--- a/src/campaign_server/campaign_server.hpp
+++ b/src/campaign_server/campaign_server.hpp
@@ -94,9 +94,9 @@ private:
 	void handle_new_client(socket_ptr socket);
 	void handle_request(socket_ptr socket, std::shared_ptr<simple_wml::document> doc);
 
+#ifndef _WIN32
 	void handle_read_from_fifo(const boost::system::error_code& error, std::size_t bytes_transferred);
 
-#ifndef _WIN32
 	void handle_sighup(const boost::system::error_code& error, int signal_number);
 #endif