diff --git a/sbin/hastd/hooks.c b/sbin/hastd/hooks.c
index 2e43357fdea9..bd132427e89b 100644
--- a/sbin/hastd/hooks.c
+++ b/sbin/hastd/hooks.c
@@ -88,32 +88,19 @@ static void hook_free(struct hookproc *hp);
 static void
 descriptors(void)
 {
-	long maxfd;
 	int fd;
 
 	/*
-	 * Close all descriptors.
+	 * Close all (or almost all) descriptors.
 	 */
-	maxfd = sysconf(_SC_OPEN_MAX);
-	if (maxfd < 0) {
-		pjdlog_errno(LOG_WARNING, "sysconf(_SC_OPEN_MAX) failed");
-		maxfd = 1024;
-	}
-	for (fd = 0; fd <= maxfd; fd++) {
-		switch (fd) {
-		case STDIN_FILENO:
-		case STDOUT_FILENO:
-		case STDERR_FILENO:
-			if (pjdlog_mode_get() == PJDLOG_MODE_STD)
-				break;
-			/* FALLTHROUGH */
-		default:
-			close(fd);
-			break;
-		}
-	}
-	if (pjdlog_mode_get() == PJDLOG_MODE_STD)
+	if (pjdlog_mode_get() == PJDLOG_MODE_STD) {
+		closefrom(MAX(MAX(STDIN_FILENO, STDOUT_FILENO),
+		    STDERR_FILENO) + 1);
 		return;
+	}
+
+	closefrom(0);
+
 	/*
 	 * Redirect stdin, stdout and stderr to /dev/null.
 	 */