From 79c23da3e3056588c96f8f3819860e2deb680687 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 11 Apr 2025 09:15:22 -0600
Subject: [PATCH] Add a necessary header.

---
 include/deal.II/lac/petsc_solver.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/deal.II/lac/petsc_solver.h b/include/deal.II/lac/petsc_solver.h
index 5d2b3d61d3..f09443d05a 100644
--- a/include/deal.II/lac/petsc_solver.h
+++ b/include/deal.II/lac/petsc_solver.h
@@ -20,6 +20,7 @@
 
 #ifdef DEAL_II_WITH_PETSC
 
+#  include <deal.II/base/mpi_stub.h>
 #  include <deal.II/base/observer_pointer.h>
 
 #  include <deal.II/lac/exceptions.h>
-- 
2.39.5