diff --git a/dune/xt/la/container/matrix-interface.hh b/dune/xt/la/container/matrix-interface.hh
index 3172e004ef0ae840bc3c4b5ade23050858d5b862..9100a02b4d6cf26435fb0dc3a182ad4b24835fdb 100644
--- a/dune/xt/la/container/matrix-interface.hh
+++ b/dune/xt/la/container/matrix-interface.hh
@@ -17,6 +17,7 @@
 #include <limits>
 #include <iostream>
 #include <type_traits>
+#include <set>
 
 #include <dune/common/ftraits.hh>