diff --git a/configure.in b/configure.in
index 539021d37f..7417d8d97c 100644
--- a/configure.in
+++ b/configure.in
@@ -786,7 +786,14 @@ AC_CHECK_FUNCS(fchmod)
 AC_CHECK_FUNCS(semtimedop)
 AC_CHECK_FUNCS(fegetenv)
 AC_CHECK_FUNCS(strerror_r)
+case $host in
+	*-darwin*)
+	ac_cv_func_fdatasync=no
+	;;
+	*)
 AC_CHECK_FUNCS(fdatasync fsync)
+	;;
+esac
 AC_CHECK_FUNCS(poll)
 dnl AC_CHECK_FUNCS(AO_compare_and_swap_full)
 AC_COMPILE_IFELSE(