diff --git a/sbin/restore/restore.8 b/sbin/restore/restore.8
index 24bac13ce80f..d84d6a876ea3 100644
--- a/sbin/restore/restore.8
+++ b/sbin/restore/restore.8
@@ -437,6 +437,11 @@ owner, mode, and time stamps for directories.
 .It Pa \&./restoresymtable
 information passed between incremental restores.
 .El
+.Sh ENVIRONMENT
+.Bl -tag -width ".Ev TMPDIR"
+.It Ev TMPDIR
+Name of directory where temporary files are to be created.
+.El
 .Sh SEE ALSO
 .Xr dump 8 ,
 .Xr mount 8 ,