diff --git a/boost/numpy/ndarray.hpp b/boost/numpy/ndarray.hpp
index 8c2a262..69327cc 100644
--- a/boost/numpy/ndarray.hpp
+++ b/boost/numpy/ndarray.hpp
@@ -137,6 +137,9 @@ class ndarray : public python::object
    *  @internal This is simply a call to PyArray_Return();
    */
   python::object scalarize() const;
+  public:
+    ndarray()
+        :python::object() {}
 };
 
 /**