From 8ed5a59f4eec72d2732a0ab47703aeb7f37dda84 Mon Sep 17 00:00:00 2001
From: rok-cesnovar <rok.cesnovar@fri.uni-lj.si>
Date: Tue, 21 Dec 2021 18:02:22 +0100
Subject: [PATCH] add back static constexpr

---
 stan/math/prim/fun/matrix_exp_action_handler.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stan/math/prim/fun/matrix_exp_action_handler.hpp b/stan/math/prim/fun/matrix_exp_action_handler.hpp
index 65e2691e28d..67a13ad03d7 100644
--- a/stan/math/prim/fun/matrix_exp_action_handler.hpp
+++ b/stan/math/prim/fun/matrix_exp_action_handler.hpp
@@ -23,8 +23,8 @@ namespace math {
  * and t is double.
  */
 class matrix_exp_action_handler {
-  int p_max = 8;
-  int m_max = 55;
+  static constexpr int p_max = 8;
+  static constexpr int m_max = 55;
   static constexpr double tol = 1.0e-16;
 
   const std::vector<double> theta_m_single{