diff --git a/test/bll_and_function.cpp b/test/bll_and_function.cpp
index 4494f6e..4223731 100644
--- a/test/bll_and_function.cpp
+++ b/test/bll_and_function.cpp
@@ -21,13 +21,13 @@ using namespace std;
 
 void test_function() {
 
-  boost::function<int, int, int> f;
+  boost::function<int (int, int)> f;
   f = _1 + _2;
 
  BOOST_TEST(f(1, 2)== 3);
 
  int i=1; int j=2;
- boost::function<int&, int&, int> g = _1 += _2;
+ boost::function<int& (int&, int)> g = _1 += _2;
  g(i, j);
  BOOST_TEST(i==3);
 
@@ -35,7 +35,7 @@ void test_function() {
 
   int* sum = new int();
   *sum = 0;
-  boost::function<int&, int> counter = *sum += _1;
+  boost::function<int& (int)> counter = *sum += _1;
   counter(5); // ok, sum* = 5;
   BOOST_TEST(*sum == 5);
   delete sum;