--- ./include/os.h_orig	2026-06-22 10:57:57.378590142 -0500
+++ ./include/os.h	2026-06-22 10:58:25.406270148 -0500
@@ -159,6 +159,10 @@
 # include <netinet/ip.h>
 #endif
 
+#if defined(ip_len) && defined(_AIX)
+# undef ip_len
+#endif
+
 #ifdef HAVE_NETINET_TCP_H
 # include <netinet/tcp.h>
 #endif