diff --git a/docs/changes.txt b/docs/changes.txt
index 96082ca..b454f2e 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -53,3 +53,4 @@ v0.4
 
 v0.5
 * nfqws2: u8add,u16add,u24add,u32add luacalls
+* nfqws2: abandon any arithmetics beyond 32bit (because lua 5.1 does not support 64 bit integers, store everything as double)