diff --git a/dirneucoupling.cc b/dirneucoupling.cc
index 160ff8b4dbc2ff4336c505326f93fc6c7e07c683..0dc6222b58e214999783125c42d1f68264fc7413 100644
--- a/dirneucoupling.cc
+++ b/dirneucoupling.cc
@@ -1,7 +1,5 @@
 #include <config.h>
 
-#define HAVE_IPOPT
-
 #include <dune/grid/onedgrid.hh>
 #include <dune/grid/uggrid.hh>