From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 11 Apr 2025 15:15:22 +0000 (-0600)
Subject: Add a necessary header.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F18353%2Fhead;p=dealii.git

Add a necessary header.
---

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>