diff --git a/src/test-gradient-method.cc b/src/test-gradient-method.cc
index 0f15006d8788935ceb22698858f62bb523de59b9..bd8991a6a2fd6f6a69d63fee9eeafab01752eb2b 100644
--- a/src/test-gradient-method.cc
+++ b/src/test-gradient-method.cc
@@ -5,6 +5,7 @@
 #endif
 
 #include <dune/common/exceptions.hh>
+#include <dune/common/shared_ptr.hh>
 #include <dune/common/stdstreams.hh>
 
 #include <dune/tectonic/samplefunctional.hh>