diff --git a/TODO b/TODO
index 759a7aa23ea73328c5c8536e49a4eac0f1ca70c0..2cb3946290a26e71e5472722d6ae2c129bee4d65 100644
--- a/TODO
+++ b/TODO
@@ -2,3 +2,6 @@ smradiusd:
 * Eval around actual code in process_request?
 
 * Strip off whitespaces around attributes
+
+usage related queries:
+* Use Math module to perform calculations