diff --git a/summary/main.tex b/summary/main.tex
index ce2c868..ee3e64e 100644
--- a/summary/main.tex
+++ b/summary/main.tex
@@ -106,10 +106,11 @@ for any ACM publication --- conference or journal, and for any stage
 of publication, from review to final ``camera-ready'' copy, to the
 author's own version, with {\itshape very} few changes to the source.
 
-\section{Math}
-\begin{math}
+\section{Math}\label{sec:math}
+\begin{equation}
+  \label{eq:equation}
   \mathcal{L}_u = \frac{1}{B_u} \sum_{i=1}^{B_u} \mathbbm{1}(\max(p_i) \geq \tau) \mathcal{H}(\hat{y}_i,F(\mathcal{T}_{\text{strong}}(u_i)))
-\end{math}
+\end{equation}
 As noted in the introduction, the ``\verb|acmart|'' document class can
 be used to prepare many different kinds of documentation --- a
 double-blind initial submission of a full-length technical paper, a