diff --git a/man/mthread.1 b/man/mthread.1
index 0ee1216..fd1484a 100644
--- a/man/mthread.1
+++ b/man/mthread.1
@@ -7,7 +7,7 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl v
-.Ar msgs\ ...
+.Op Ar msgs\ ...
 .Sh DESCRIPTION
 .Nm
 groups messages together in parent/child relationships based on