--- libfyaml-0.9/src/util/fy-endian.h.orig	2023-03-31 16:42:43.000000000 +0200
+++ libfyaml-0.9/src/util/fy-endian.h	2025-10-22 16:51:45.278091506 +0200
@@ -8,7 +8,7 @@
 #ifndef FY_ENDIAN_H
 #define FY_ENDIAN_H
 
-#if defined(__linux__) || defined(__CYGWIN__) || defined(__OpenBSD__)
+#if defined(__linux__) || defined(__CYGWIN__) || defined(__OpenBSD__) || defined(__illumos__)
 # include <endian.h>
 #elif defined(__APPLE__)
 # include <libkern/OSByteOrder.h>