Fix missing include filed in multigrid/interface_matrix_entry_01

diff --git a/tests/multigrid/interface_matrix_entry_01.cc b/tests/multigrid/interface_matrix_entry_01.cc
index 89101a0c472146bdbae3ecdd4742f0529097e5e9..26c78229d8c34c29d025625f3a53ea93b375ea09 100644 (file)
--- a/tests/multigrid/interface_matrix_entry_01.cc
+++ b/tests/multigrid/interface_matrix_entry_01.cc
@@ -42,6 +42,7 @@
 #include <deal.II/multigrid/mg_constrained_dofs.h>
 #include <deal.II/multigrid/multigrid.h>
 
+#include <deal.II/lac/dynamic_sparsity_pattern.h>
 #include <deal.II/lac/sparse_matrix.h>
 #include <deal.II/lac/generic_linear_algebra.h>