diff --git a/triqs/python_tools/wrapper_tools.hpp b/triqs/python_tools/wrapper_tools.hpp
index eec88bee..f1eeffab 100644
--- a/triqs/python_tools/wrapper_tools.hpp
+++ b/triqs/python_tools/wrapper_tools.hpp
@@ -372,7 +372,7 @@ inline static void import_numpy() {
   static bool init = false;
   if (!init) {
     _import_array();
-    std::cerr << "importing array"<<std::endl;
+    //std::cerr << "importing array"<<std::endl;
     init = true;
   }
 }