diff --git a/configure.ac b/configure.ac
index 455a224eb..e919dee37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -775,6 +775,8 @@ main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
 		AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
 		    [Prepend the address family to IP tunnel traffic])
 	fi
+	AC_DEFINE([SYS_RDOMAIN_LINUX], [1],
+		  [Support routing domains using Linux VRF])
 	AC_CHECK_HEADERS([linux/seccomp.h linux/filter.h linux/audit.h], [],
 	    [], [#include <linux/types.h>])
 	AC_MSG_CHECKING([for seccomp architecture])