diff --git a/INSTALL b/INSTALL
index ee4ed5a0..ca79f107 100644
--- a/INSTALL
+++ b/INSTALL
@@ -51,7 +51,7 @@ Setup on Arch Linux:
    If those php extensions are separate packages on your system, install
    them.
 
-   AUR requires PEAR and the Archive_Tar module.
+   AUR requires PEAR and the Archive_Tar module (version > 1.3.7).
    Installing PEAR will vary depending on the system and may already
    be included with PHP. You can also find it in the PHP source
    distribution.
diff --git a/UPGRADING b/UPGRADING
index e0875d38..9318b711 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -13,6 +13,8 @@ ALTER TABLE Users ADD COLUMN PGPKey VARCHAR(40) NULL DEFAULT NULL;
 
 2. Merge "web/lib/config.inc.php.proto" with "web/lib/config.inc.php".
 
+3. Update Archive_Tar to version greater than 1.3.7.
+
 From 1.9.0 to 1.9.1
 -------------------