diff --git a/Doc/lib/librexec.tex b/Doc/lib/librexec.tex
index 4ea3f3c..972c582 100644
--- a/Doc/lib/librexec.tex
+++ b/Doc/lib/librexec.tex
@@ -123,7 +123,7 @@
 
 Methods whose names begin with \code{s_} are similar to the functions
 beginning with \code{r_}, but the code will be granted access to
-restricted versions of the standard I/O streans \code{sys.stdin},
+restricted versions of the standard I/O streams \code{sys.stdin},
 \code{sys.stderr}, and \code{sys.stdout}.  
 
 \begin{funcdesc}{s_eval}{code}
diff --git a/Doc/librexec.tex b/Doc/librexec.tex
index 4ea3f3c..972c582 100644
--- a/Doc/librexec.tex
+++ b/Doc/librexec.tex
@@ -123,7 +123,7 @@
 
 Methods whose names begin with \code{s_} are similar to the functions
 beginning with \code{r_}, but the code will be granted access to
-restricted versions of the standard I/O streans \code{sys.stdin},
+restricted versions of the standard I/O streams \code{sys.stdin},
 \code{sys.stderr}, and \code{sys.stdout}.  
 
 \begin{funcdesc}{s_eval}{code}