diff --git a/share/man/man9/mutex.9 b/share/man/man9/mutex.9
index dcba13509ffb..647dad17d661 100644
--- a/share/man/man9/mutex.9
+++ b/share/man/man9/mutex.9
@@ -47,7 +47,7 @@
 .Fn mtx_init "struct mtx *mutex" "char *name" "flags"
 .Ft void
 .Fn mtx_enter "struct mtx *mutex" "int flags"
-.Ft void
+.Ft int
 .Fn mtx_try_enter "struct mtx *mutex" "int flags"
 .Ft void
 .Fn mtx_exit "struct mtx *mutex" "int flags"