diff --git a/test/triqs/arrays/mapped_functions.cpp b/test/triqs/arrays/mapped_functions.cpp
index faf8ab72..a506b563 100644
--- a/test/triqs/arrays/mapped_functions.cpp
+++ b/test/triqs/arrays/mapped_functions.cpp
@@ -53,6 +53,8 @@ template<typename T> void test( T val=1 ) {
  auto aa = array<T,2>{ { 1,2}, {3,4}};
  TEST(make_matrix(exp(aa)));
 
+ TEST(make_matrix(conj(A)));
+ 
  // does not compile, since exp is only element wise at the moment
  // to do : implement it for matrix...
  //TEST(make_matrix(exp( matrix<double>{{ 1,2}, {3,4}} )));
@@ -60,7 +62,7 @@ template<typename T> void test( T val=1 ) {
 
 int main(int argc, char **argv) {
 
- 
+ conj (8); 
  test<int>();
  test<long>();
  test<double>();
diff --git a/test/triqs/arrays/mapped_functions.output b/test/triqs/arrays/mapped_functions.output
index b6584857..5843c2db 100644
--- a/test/triqs/arrays/mapped_functions.output
+++ b/test/triqs/arrays/mapped_functions.output
@@ -42,6 +42,10 @@
 (make_matrix(exp(aa))) ---> 
 [[2.71828,7.38906]
  [20.0855,54.5982]]
+(make_matrix(conj(A))) ---> 
+[[1,3,5]
+ [2,4,6]
+ [3,5,7]]
 (A) ---> 
 [[1,3,5]
  [2,4,6]
@@ -86,6 +90,10 @@
 (make_matrix(exp(aa))) ---> 
 [[2.71828,7.38906]
  [20.0855,54.5982]]
+(make_matrix(conj(A))) ---> 
+[[1,3,5]
+ [2,4,6]
+ [3,5,7]]
 (A) ---> 
 [[1,3,5]
  [2,4,6]
@@ -130,6 +138,10 @@
 (make_matrix(exp(aa))) ---> 
 [[2.71828,7.38906]
  [20.0855,54.5982]]
+(make_matrix(conj(A))) ---> 
+[[(1,0),(3,0),(5,0)]
+ [(2,0),(4,0),(6,0)]
+ [(3,0),(5,0),(7,0)]]
 (A) ---> 
 [[(1,0),(3,0),(5,0)]
  [(2,0),(4,0),(6,0)]
@@ -174,6 +186,10 @@
 (make_matrix(exp(aa))) ---> 
 [[(2.71828,0),(7.38906,0)]
  [(20.0855,0),(54.5982,0)]]
+(make_matrix(conj(A))) ---> 
+[[(1,0),(3,0),(5,0)]
+ [(2,0),(4,0),(6,0)]
+ [(3,0),(5,0),(7,0)]]
 (A) ---> 
 [[(-2,3),(-6,9),(-10,15)]
  [(-4,6),(-8,12),(-12,18)]
@@ -218,3 +234,7 @@
 (make_matrix(exp(aa))) ---> 
 [[(2.71828,0),(7.38906,0)]
  [(20.0855,0),(54.5982,0)]]
+(make_matrix(conj(A))) ---> 
+[[(-2,-3),(-6,-9),(-10,-15)]
+ [(-4,-6),(-8,-12),(-12,-18)]
+ [(-6,-9),(-10,-15),(-14,-21)]]
diff --git a/triqs/arrays/mapped_functions.hpp b/triqs/arrays/mapped_functions.hpp
index 2b68ba47..32b3af73 100644
--- a/triqs/arrays/mapped_functions.hpp
+++ b/triqs/arrays/mapped_functions.hpp
@@ -24,6 +24,11 @@
 #include <boost/preprocessor/seq/for_each.hpp>
 namespace triqs { namespace arrays {
 
+ // complex conjugation for integers
+ inline int conj(int const& x) { return x; }
+ inline long conj(long const& x) { return x; }
+ inline long long conj(long long const& x) { return x; }
+
  //C++14 will simply be ... 
  //template <typename A> decltype(auto) abs(A && a) { return map( [](auto const &x) { using std::abs; return abs(a);}, std::forward<A>(a));}
 
@@ -45,7 +50,7 @@ namespace triqs { namespace arrays {
  typename boost::lazy_enable_if_c<ImmutableCuboidArray<A>::value,std::result_of<map_impl<__triqs_##FNT##_wrap,1>(A)>>::type\
  FNT(A && a) { return map(__triqs_##FNT##_wrap{})(std::forward<A>(a)); }
  
-#define TRIQS_ARRAYS_MATH_FNT (abs)(real)(imag)(floor)
+#define TRIQS_ARRAYS_MATH_FNT (abs)(real)(imag)(floor)(conj)
 
 #define AUX(r, data, elem) MAP_IT(elem)
  BOOST_PP_SEQ_FOR_EACH(AUX , nil , TRIQS_ARRAYS_MATH_FNT);