diff --git a/approx_alg.tex b/approx_alg.tex
index 9fef447..7bd712c 100644
--- a/approx_alg.tex
+++ b/approx_alg.tex
@@ -143,7 +143,7 @@ as well as for all three queries of the PDBench \abbrBIDB benchmark (see \Cref{a
 \secrev{
 \begin{Lemma}
 \label{lem:c-TIDB-gamma}
-Given \emph{\abbrOneBIDB} computed from the reduction of~\Cref{def:ctidb-reduct}, $\gamma\inparen{\circuit}\leq 1 - \inparen{c + 1}^{\inparen{k-1}}$.
+Given \emph{\abbrOneBIDB} computed from the reduction of~\Cref{def:ctidb-reduct}, $\gamma\inparen{\circuit}\leq 1 - \inparen{c + 1}^{-\inparen{k-1}}$.
 \end{Lemma}
 \begin{proof}[Proof of~\Cref{lem:c-TIDB-gamma}]
 Let $\pdb' = \inparen{\onebidbworlds{\tupset'}, \pdb'}$ be the reduced \abbrOneBIDB and $\pdb = \inparen{\worlds, \pdb}$ the original \abbrCTIDB.