diff --git a/notes/pbft.md b/notes/pbft.md
index 5c66d67ea240a1aa1d1cd3806ab2d96a05c2700e..ee627b6f058b081563c5d3b27b257a8756a02a95 100644
--- a/notes/pbft.md
+++ b/notes/pbft.md
@@ -48,7 +48,7 @@
 1. Client waits for $f+1$ replies from different reqplicas w/ same result
 
 - guarantees:
-  - safety and liveness (assuming only $\lfloor \frac{n-1}{3}} \rfloor$ faulty, *delay(t)* does not grow faster than *t* indefinitely
+  - safety and liveness (assuming only $\left\lfloor \frac{n-1}{3}} \right\rfloor$ faulty, *delay(t)* does not grow faster than *t* indefinitely
 
 ![pbft normal case](pbftNormal.png)