diff --git a/share/man/man9/mi_switch.9 b/share/man/man9/mi_switch.9
index 46e7a8e9e4cd..835356744647 100644
--- a/share/man/man9/mi_switch.9
+++ b/share/man/man9/mi_switch.9
@@ -60,7 +60,7 @@ can be enumerated as follows:
 .It
 From within a function such as
 .Xr cv_wait 9 ,
-.Xr mtx_lock ,
+.Xr mtx_lock 9 ,
 or
 .Xr tsleep 9
 when the current thread