--- qgis-3.18.0/src/server/qgis_map_serv.cpp.orig	2021-02-24 17:05:17.609036243 +0100
+++ qgis-3.18.0/src/server/qgis_map_serv.cpp	2021-02-24 17:05:31.697185106 +0100
@@ -23,7 +23,7 @@
 #include "qgsfcgiserverrequest.h"
 #include "qgsapplication.h"
 
-#include <fcgi_stdio.h>
+#include <fastcgi/fcgi_stdio.h>
 #include <cstdlib>
 
 #include <QFontDatabase>