From 031b64f42814c36a1c71212948db896853ee8e6f Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 11 Jun 2021 09:15:31 -0600
Subject: [PATCH] Provide a definition of a static variable.

---
 source/dofs/dof_handler.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/dofs/dof_handler.cc b/source/dofs/dof_handler.cc
index 7b26b157ce..ade43ed966 100644
--- a/source/dofs/dof_handler.cc
+++ b/source/dofs/dof_handler.cc
@@ -40,10 +40,15 @@
 
 DEAL_II_NAMESPACE_OPEN
 
+template <int dim, int spacedim>
+const unsigned int DoFHandler<dim, spacedim>::default_fe_index;
+
+
 template <int dim, int spacedim>
 const typename DoFHandler<dim, spacedim>::active_fe_index_type
   DoFHandler<dim, spacedim>::invalid_active_fe_index;
 
+
 namespace internal
 {
   template <int dim, int spacedim>
-- 
2.39.5