diff --git a/dune/fem-dg/main/main.hh b/dune/fem-dg/main/main.hh
index 964853c7f47e10bf683e8e2bdb9a1a62f9495da2..e4f90208bb7d2ad201452ed2376f83ed942099f3 100644
--- a/dune/fem-dg/main/main.hh
+++ b/dune/fem-dg/main/main.hh
@@ -1,9 +1,9 @@
 #ifndef DUNE_FEM_DG_MAINHEADER_HH
 #define DUNE_FEM_DG_MAINHEADER_HH
 
-//#ifdef COUNT_FLOPS
+#ifdef COUNT_FLOPS
 #include <dune/fem/misc/double.hh>
-//#endif
+#endif
 
 // streams for backup
 #include <dune/fem-dg/misc/streams.hh>