diff --git a/include/ircd/db/db.h b/include/ircd/db/db.h
index 70e4c6e20..14d574ff5 100644
--- a/include/ircd/db/db.h
+++ b/include/ircd/db/db.h
@@ -94,6 +94,7 @@ namespace ircd::db
 
 	rocksdb::Slice slice(const string_view &);
 	string_view slice(const rocksdb::Slice &);
+	size_t size(const rocksdb::Slice &);
 
 	bool valid(const rocksdb::Iterator &);
 	string_view key(const rocksdb::Iterator &);
diff --git a/ircd/db.cc b/ircd/db.cc
index 9b2ce9d55..c11053c2a 100644
--- a/ircd/db.cc
+++ b/ircd/db.cc
@@ -4290,6 +4290,12 @@ ircd::db::val(const rocksdb::Iterator &it)
 	return slice(it.value());
 }
 
+size_t
+ircd::db::size(const rocksdb::Slice &slice)
+{
+	return slice.size();
+}
+
 rocksdb::Slice
 ircd::db::slice(const string_view &sv)
 {