diff --git a/agglomeration_poisson/source/agglomeration_handler.cc b/agglomeration_poisson/source/agglomeration_handler.cc
index 96e3ef92..68b42ed1 100644
--- a/agglomeration_poisson/source/agglomeration_handler.cc
+++ b/agglomeration_poisson/source/agglomeration_handler.cc
@@ -9,6 +9,7 @@
  * -----------------------------------------------------------------------------
  */
 
+#include <deal.II/base/quadrature_lib.h>
 #include <deal.II/lac/sparsity_tools.h>
 
 #include <agglomeration_handler.h>