--- unix/network.c	2026-05-15 03:28:46.000000000 +0800
+++ unix/network.c	2026-05-29 17:41:44.000000000 +0800
@@ -32,6 +32,10 @@
 # define X11_UNIX_PATH "/tmp/.X11-unix/X"
 #endif
 
+#ifndef MSG_NOSIGNAL
+# define MSG_NOSIGNAL 0
+#endif
+
 /*
  * Access to sockaddr types without breaking C strict aliasing rules.
  */