diff --git a/install.sh b/install.sh
index 07b83bc..75f36e0 100644
--- a/install.sh
+++ b/install.sh
@@ -142,6 +142,7 @@ mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_log $BT
 mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_crash $BTRFS /mnt/var/crash
 mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_cache $BTRFS /mnt/var/cache
 mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_tmp $BTRFS /mnt/var/tmp
+chmod 1777 /mnt/var/tmp
 mount -o ssd,noatime,space_cache,compress=zstd:15,nodatacow,subvol=@/var_tmp $BTRFS /mnt/var/spool
 mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/var_lib_gdm $BTRFS /mnt/var/lib/gdm
 mount -o ssd,noatime,space_cache,compress=zstd:15,subvol=@/var_lib_AccountsService $BTRFS /mnt/var/lib/AccountsService