diff --git a/docs/manual.md b/docs/manual.md
index e3a8e912..ffb854f9 100644
--- a/docs/manual.md
+++ b/docs/manual.md
@@ -969,7 +969,7 @@ If you are booting from U-Boot, use the following command to start the system im
     => go 0x90000000
 
 Note that the OpenSBI version from the CVA6 SDK at the time of writing has issues when
-booting.
+booting. It is recommended to use the mainline OpenSBI.
 
 ## Adding Platform Support