diff --git a/doc/DATABASE.md b/doc/DATABASE.md
index 1a86dbf..6c4920b 100644
--- a/doc/DATABASE.md
+++ b/doc/DATABASE.md
@@ -11,3 +11,4 @@
 - `s:nx:sha1` sorted set of SHA1 non-existing hashes
 - `s:exist:md5` sorted set of SHA1 existing hashes
 - `s:exixt:sha1` sorted set of SHA1 existing hashes
+- `stat:<NSRLname>` string with the number of items imported