diff --git a/share/man/man9/mutex.9 b/share/man/man9/mutex.9
index 43d523a56c98..cb207ff4596a 100644
--- a/share/man/man9/mutex.9
+++ b/share/man/man9/mutex.9
@@ -28,7 +28,7 @@
 .\"	from BSDI $Id: mutex.4,v 1.1.2.3 1998/04/27 22:53:13 ewv Exp $
 .\" $FreeBSD$
 .\"
-.Dd May 24, 2017
+.Dd February 17, 2023
 .Dt MUTEX 9
 .Os
 .Sh NAME
@@ -74,7 +74,7 @@
 .Fn mtx_trylock "struct mtx *mutex"
 .Ft int
 .Fn mtx_trylock_flags "struct mtx *mutex" "int flags"
-.Ft void
+.Ft int
 .Fn mtx_trylock_spin "struct mtx *mutex"
 .Ft int
 .Fn mtx_trylock_spin_flags "struct mtx *mutex" "int flags"