diff --git a/test4/test4.hpp b/test4/test4.hpp
index 20339447..e57f5e23 100644
--- a/test4/test4.hpp
+++ b/test4/test4.hpp
@@ -17,8 +17,8 @@
 #ifndef TEST4_H
 #define TEST4_H
 
-#define USE_BANDED
-//#define USE_DIAGONAL
+//#define USE_BANDED
+#define USE_DIAGONAL
 
 namespace ublas = boost::numeric::ublas;