--- curl-7.78.0/include/curl/curl.h	2021-07-19 08:19:57.000000000 +0100
+++ curl-7.78.0.serenity/include/curl/curl.h	2021-07-29 23:52:44.532510736 +0100
@@ -74,7 +74,7 @@
 #if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
     defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY) || \
     defined(ANDROID) || defined(__ANDROID__) || defined(__OpenBSD__) || \
-    defined(__CYGWIN__) || defined(AMIGA) || defined(__NuttX__) || \
+    defined(__CYGWIN__) || defined(AMIGA) || defined(__NuttX__) || defined(__serenity__) || \
    (defined(__FreeBSD_version) && (__FreeBSD_version < 800000)) || \
     defined(__VXWORKS__)
 #include <sys/select.h>