diff --git a/man/retro.1 b/man/retro.1
index b5e6dda..8fceda7 100644
--- a/man/retro.1
+++ b/man/retro.1
@@ -30,7 +30,7 @@ Start Retro in interactive mode.
 .It Fl s
 Start Retro in interactive mode and suppress the startup message.
 .It Fl v
-Run in verbose mode, showing debugging information.
+Run in verbose mode, showing debugging information. Verbose output is written to /dev/stderr.
 .It Fl t Ar filename
 Run any code and test blocks in the specified file.
 .It Fl f Ar filename