diff --git a/fastbril/README.md b/fastbril/README.md
index 6cc31933b..bd3fff43b 100644
--- a/fastbril/README.md
+++ b/fastbril/README.md
@@ -9,6 +9,7 @@ be like the typescript or rust implementation, but faster.
   the binary will be `./build/fastbrili`
 + doc: you need to have LaTeX installed. run `make doc`
   the doc will be `./doc/brb.pdf`
+  there is a prebuilt pdf in case this is difficult