diff --git a/dune/tectonic/myconvexproblem.hh b/dune/tectonic/myconvexproblem.hh
index 1ec3684930d698dac1671a58f664ff1d91d15d3e..3053151e1135658bcdc264894bec4796b3d534c4 100644
--- a/dune/tectonic/myconvexproblem.hh
+++ b/dune/tectonic/myconvexproblem.hh
@@ -1,5 +1,7 @@
 // Based on dune/tnnmg/problem-classes/convexproblem.hh
 
+#include <dune/tectonic/myglobalnonlinearity.hh>
+
 #ifndef MY_CONVEX_PROBLEM_HH
 #define MY_CONVEX_PROBLEM_HH