diff --git a/kiss.1 b/kiss.1
index 6454cde..e94aacc 100644
--- a/kiss.1
+++ b/kiss.1
@@ -98,6 +98,11 @@ export KISS_ROOT=/
 # Set it to '1' to enable.
 export KISS_KEEPLOG=0
 
+# Compression method to use for package tarballs.
+#
+# Valid options: 'xz' (default), 'gz'
+export KISS_COMPRESS=xz
+
 # Keep build, package and extraction cache directories for debugging
 # purposes.
 #