diff --git a/src/ASM/FiniteElement.C b/src/ASM/FiniteElement.C
index 6dd77c40..82d6e188 100644
--- a/src/ASM/FiniteElement.C
+++ b/src/ASM/FiniteElement.C
@@ -39,10 +39,22 @@ std::ostream& FiniteElement::write (std::ostream& os) const
 }
 
 
+MxFiniteElement::MxFiniteElement (const std::vector<size_t>& n, size_t ip)
+  : FiniteElement(n.front(),ip)
+{
+  Nx.resize(n.size()-1);
+  for (size_t b = 1; b < n.size(); b++)
+    Nx[b-1].resize(n[b]);
+
+  dNxdX.resize(Nx.size());
+  d2NxdX2.resize(Nx.size());
+}
+
+
 std::ostream& MxFiniteElement::write (std::ostream& os) const
 {
   this->FiniteElement::write(os);
-  for (size_t b = 0; b+1 < Nx.size(); b++)
+  for (size_t b = 0; b < Nx.size(); b++)
   {
     os <<"Basis "<< b+2 <<":\n";
     if (!Nx[b].empty())      os <<"N:"<< Nx[b];
diff --git a/src/ASM/FiniteElement.h b/src/ASM/FiniteElement.h
index 07edfc0d..1e35b54a 100644
--- a/src/ASM/FiniteElement.h
+++ b/src/ASM/FiniteElement.h
@@ -88,10 +88,8 @@ public:
 class MxFiniteElement : public FiniteElement
 {
 public:
-  //! \brief Default constructor.
-  MxFiniteElement(const std::vector<size_t>& n, size_t i = 0) :
-    FiniteElement(n.front(),i), Nx(n.size()-1), dNxdX(n.size()-1), d2NxdX2(n.size()-1)
-  {}
+  //! \brief The constructor initializes the size of each basis.
+  MxFiniteElement(const std::vector<size_t>& n, size_t ip = 0);
 
   //! \brief Empty destructor.
   virtual ~MxFiniteElement() {}
diff --git a/src/ASM/Test/TestFiniteElement.C b/src/ASM/Test/TestFiniteElement.C
new file mode 100644
index 00000000..d9198b2f
--- /dev/null
+++ b/src/ASM/Test/TestFiniteElement.C
@@ -0,0 +1,30 @@
+//==============================================================================
+//!
+//! \file TestFiniteElement.C
+//!
+//! \date Nov 17 2016
+//!
+//! \author Knut Morten Okstad / SINTEF
+//!
+//! \brief Unit tests for FiniteElement.
+//!
+//==============================================================================
+
+#include "FiniteElement.h"
+
+#include "gtest/gtest.h"
+
+
+TEST(TestFiniteElement, Print)
+{
+  FiniteElement   fe1(4);
+  MxFiniteElement fe2({3,2,4});
+
+  std::cout << fe1 << std::endl;
+  std::cout << fe2 << std::endl;
+
+  ASSERT_EQ((int)fe1.N.size(),4);
+  ASSERT_EQ((int)fe2.basis(1).size(),3);
+  ASSERT_EQ((int)fe2.basis(2).size(),2);
+  ASSERT_EQ((int)fe2.basis(3).size(),4);
+}