diff --git a/text/pvm_invocations.tex b/text/pvm_invocations.tex
index 5d08fa3..d6913cf 100644
--- a/text/pvm_invocations.tex
+++ b/text/pvm_invocations.tex
@@ -502,7 +502,7 @@ \subsection{Accumulate Functions}\label{sec:accumulatefunctions}
     \end{cases} \\
     \using b &= (\mathbf{x}_\mathbf{s})_b - a \\
     (\omega'_0, \mathbf{x}'_\mathbf{t}, (\mathbf{x}'_\mathbf{s})_b) &\equiv \begin{cases}
-      (\mathtt{OOB}, \mathbf{x}_\mathbf{t}, (\mathbf{x}_\mathbf{s})_b) &\when t = \error \\
+      (\mathtt{OOB}, \mathbf{x}_\mathbf{t}, (\mathbf{x}_\mathbf{s})_b) &\when \mathbf{t} = \error \\
       (\mathtt{WHO}, \mathbf{x}_\mathbf{t}, (\mathbf{x}_\mathbf{s})_b) &\otherwhen d \not \in \keys{\delta \cup \mathbf{x}_\mathbf{n}} \\
       (\mathtt{LOW}, \mathbf{x}_\mathbf{t}, (\mathbf{x}_\mathbf{s})_b) &\otherwhen g < (\delta \cup \mathbf{x}_\mathbf{n})[d]_m \\
       (\mathtt{HIGH}, \mathbf{x}_\mathbf{t}, (\mathbf{x}_\mathbf{s})_b) &\otherwhen \xi < g \\