diff --git a/zathura.1 b/zathura.1
index 972c703..1deadd6 100644
--- a/zathura.1
+++ b/zathura.1
@@ -12,6 +12,9 @@ zathura \- a PDF viewer
 zathura is a highly customizable and functional PDF viewer based on the poppler
 rendering library and the gtk+ toolkit. zathura provides a minimalistic and
 space saving interface, with a focus on keyboard interaction.
+
+If instead of a filename - is specified on the command line, zathura tries to
+render a PDF file piped to zathura via stdin.
 .SH OPTIONS
 .TP
 .B -e xid