diff --git a/tex-stuff/math.tex b/tex-stuff/math.tex
index 9150c1c..54a0fc8 100644
--- a/tex-stuff/math.tex
+++ b/tex-stuff/math.tex
@@ -153,7 +153,7 @@ TODO
 
 \subsubsection{Addition to Round 1: Encrypt bid}
 
-The Bidders also have to use Proof 2 to show that $ ECDL_Y\left(\left(\sum_{j=1}^k\alpha_{a,jn+a}\right) - G\right) = ECDL_G\left(\sum_{j=1}^k\beta_{a,jn+a}\right)$.
+The Bidders also have to use Proof 2 to show that $ ECDL_Y\left(\left(\sum_{j=1}^{k/n}\alpha_{a,jn+a}\right) - G\right) = ECDL_G\left(\sum_{j=1}^{k/n}\beta_{a,jn+a}\right)$.
 This is to ensure bidders have only chosen valid bids for their bid index, since
 in M+1st price auctions the amount of possible prices is multiplied by $n$ to
 prevent ties. This increases the message size by $96$ bytes.