diff --git a/latex/thesis/chapters/proximal_decoding.tex b/latex/thesis/chapters/proximal_decoding.tex
index afc8fb5..6965f05 100644
--- a/latex/thesis/chapters/proximal_decoding.tex
+++ b/latex/thesis/chapters/proximal_decoding.tex
@@ -1264,7 +1264,7 @@ error are strongly correlated, a relationship depicted in figure
         \begin{axis}[point meta min = -1,
                      point meta max = 1,
                      grid=both,
-                     xlabel={$Var\left( \nabla h\left( \boldsymbol{x} \right)  \right) $},
+                     xlabel={$Var\left( \nabla h\left( \tilde{\boldsymbol{x}} \right)  \right) $},
                      ylabel={Bit error (bool)},
                      ytick={0, 1},
                      width=8cm,