--- rpython/rlib/_rsocket_rffi.py.orig	2023-12-23 15:29:17 UTC
+++ rpython/rlib/_rsocket_rffi.py
@@ -16,6 +16,7 @@ _MSVC  = target_platform.name == "msvc"
 _MINGW = target_platform.name == "mingw32"
 _SOLARIS = sys.platform == "sunos5"
 _MACOSX = sys.platform == "darwin"
+_FREEBSD = sys.platform.startswith('freebsd')
 _HAS_AF_PACKET = sys.platform.startswith('linux')   # only Linux for now
 
 if _POSIX:
@@ -42,7 +43,10 @@ if _POSIX:
                      'sys/ioctl.h',
                     )
 
-    cond_includes = [('AF_NETLINK', 'linux/netlink.h')]
+    if _FREEBSD:
+        cond_includes = [('AF_NETLINK', 'netlink/netlink.h')]
+    else:
+        cond_includes = [('AF_NETLINK', 'linux/netlink.h')]
 
     libraries = ()
     calling_conv = 'c'