diff --git a/doc/pacman.8.txt b/doc/pacman.8.txt
index de28b9ca..358d5065 100644
--- a/doc/pacman.8.txt
+++ b/doc/pacman.8.txt
@@ -27,8 +27,8 @@ front ends to be written (for instance, a GUI front end).
 Invoking pacman involves specifying an operation with any potential options and
 targets to operate on. A 'target' is usually a package name, filename, URL, or
 a search string. Targets can be provided as command line arguments.
-Additionally, if a single dash (-) is passed as an argument, targets will be
-read from stdin.
+Additionally, if stdin is not from a terminal and a single dash (-) is passed
+as an argument, targets will be read from stdin.
 
 
 Operations