diff --git a/doc/bn.tex b/doc/bn.tex
index 19268b3..ac84ed3 100644
--- a/doc/bn.tex
+++ b/doc/bn.tex
@@ -2015,7 +2015,7 @@ int mp_rand(mp_int *a, int digits)
 \end{alltt}
 This function generates a random number of \texttt{digits} bits.
 
-The random number generated with these two functions is cryptographically secure if the source of random numbers the operating systems offers is cryptographically secure. It will use \texttt{arc4random()} if the OS is a BSD flavor, Wincrypt on Windows, or \texttt{\\dev\\urandom} on all operating systems that have it.
+The random number generated with these two functions is cryptographically secure if the source of random numbers the operating systems offers is cryptographically secure. It will use \texttt{arc4random()} if the OS is a BSD flavor, Wincrypt on Windows, or \texttt{/dev/urandom} on all operating systems that have it.
 
 
 \chapter{Input and Output}