diff --git a/build-aux/m4/buildsys.m4 b/build-aux/m4/buildsys.m4
index 26bbf42..6585205 100644
--- a/build-aux/m4/buildsys.m4
+++ b/build-aux/m4/buildsys.m4
@@ -22,13 +22,13 @@ dnl ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 dnl POSSIBILITY OF SUCH DAMAGE.
 dnl
 
-AC_ARG_ENABLE(rpath,
-	AS_HELP_STRING([--disable-rpath], [do not use rpath]))
-
 AC_DEFUN([BUILDSYS_INIT], [
 	AC_REQUIRE([AC_CANONICAL_BUILD])
 	AC_REQUIRE([AC_CANONICAL_HOST])
 
+	AC_ARG_ENABLE(rpath,
+		AS_HELP_STRING([--disable-rpath], [do not use rpath]))
+
 	case "$build_os" in
 	darwin*)
 		case "$host_os" in