diff --git a/dune/solvers/Makefile.am b/dune/solvers/Makefile.am
index a700a0df852a356e4c580a2c8892d2739769f61d..3ae1ab1f4213e4c89b6cf5a625b028220b4a18d9 100644
--- a/dune/solvers/Makefile.am
+++ b/dune/solvers/Makefile.am
@@ -1,5 +1,5 @@
 
-SUBDIRS = common iterationsteps norms solvers transferoperators
+SUBDIRS = common iterationsteps norms operators solvers test transferoperators
 
 dune_solversdir = $(includedir)/dune/solvers
 dune_solvers_HEADERS = computeenergy.hh