--- a/libscompat.m4
+++ b/libscompat.m4
@@ -373,7 +373,7 @@
 
 	return 0;
 }], [AC_MSG_RESULT(yes)
-     AC_DEFINE(HAVE_SENDBUF_IOCTL, TIOCOUTQ, [send buffer data])
+     AC_DEFINE(HAVE_SENDBUF_IOCTL, 1, [send buffer data])
      AC_DEFINE(SENDBUF_IOCTLVAL, TIOCOUTQ, [send buffer ioctl])],
     [AC_MSG_RESULT(no)])],
     [dnl assume no when cross-compiling