diff --git a/bin/main.ml b/bin/main.ml
index a6c3791..35f6d9b 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -1,6 +1,6 @@
 let () =
   let open Inspector in
-  if Array.length Sys.argv < 2 then (
+  if Array.length Sys.argv <> 2 then (
     Printf.eprintf "Usage: %s <logfile>\n" (Filename.basename Sys.argv.(0));
     exit 1);