diff --git a/include/ircd/util.h b/include/ircd/util.h
index 9511d09a2..26003d1b2 100644
--- a/include/ircd/util.h
+++ b/include/ircd/util.h
@@ -1163,5 +1163,14 @@ struct unlock_guard
 };
 
 
+struct is_zero
+{
+	bool operator()(const size_t &value) const
+	{
+		return value == 0;
+	}
+};
+
+
 } // namespace util
 } // namespace ircd