diff --git a/module/os/linux/spl/spl-thread.c b/module/os/linux/spl/spl-thread.c
index 28ea66565b1a..949ac8467b64 100644
--- a/module/os/linux/spl/spl-thread.c
+++ b/module/os/linux/spl/spl-thread.c
@@ -67,7 +67,7 @@ __thread_exit(void)
 {
 	tsd_exit();
 	ZFS_KTHREAD_COMPLETE_AND_EXIT(NULL, 0);
-	/* Unreachable */
+	__builtin_unreachable();
 }
 EXPORT_SYMBOL(__thread_exit);