diff --git a/share/man/man9/vslock.9 b/share/man/man9/vslock.9
index e921ce0892fc..748a36a0b796 100644
--- a/share/man/man9/vslock.9
+++ b/share/man/man9/vslock.9
@@ -50,7 +50,7 @@
 .Ft void
 .Fn vslock "caddr_t addr" "u_int len"
 .Ft void
-.Fn vsunlock "caddr_t addr" "u_int len" "int dirtied"
+.Fn vsunlock "caddr_t addr" "u_int len"
 .Sh DESCRIPTION
 The
 .Fn vslock