diff --git a/src/bin/topola/cli.rs b/src/bin/topola/cli.rs
index d0c58cc..804dbd9 100644
--- a/src/bin/topola/cli.rs
+++ b/src/bin/topola/cli.rs
@@ -8,7 +8,7 @@ pub struct Cli {
     #[arg(value_name = "SPECCTRA DESIGN FILE",
 	  help = "Specify the Specctra Design (*.dsn) file input file for the Topola autorouter")]
     pub input: PathBuf,
-    #[arg(short, long, value_name = "FILE",
+    #[arg(short, long, value_name = "SESSION FILE",
 	  help = "Specify the output Topola session file (*.ses)")
     ]
     pub output: Option<PathBuf>,