diff --git a/arcane/src/arcane/core/matvec/Matrix.cc b/arcane/src/arcane/core/matvec/Matrix.cc
index 3d8bbe281..5b3e6863b 100644
--- a/arcane/src/arcane/core/matvec/Matrix.cc
+++ b/arcane/src/arcane/core/matvec/Matrix.cc
@@ -480,7 +480,7 @@ _applySolver(const Matrix& a, const Vector& b, Vector& x, Real epsilon, IPrecond
   r.dump(cout);
   cout << '\n';*/
 
-  Vector d(r.size());
+  Vector d(r.size(), 0.0);
   if (p)
     p->apply(d, r);
   else
@@ -488,7 +488,7 @@ _applySolver(const Matrix& a, const Vector& b, Vector& x, Real epsilon, IPrecond
 
   Vector q(r.size());
   Vector t(r.size());
-  Vector s(r.size());
+  Vector s(r.size(), 0.0);
   Real delta_new = 0.0;
   //Real r0=mat_op.dot(r);
   if (p) {
@@ -505,7 +505,9 @@ _applySolver(const Matrix& a, const Vector& b, Vector& x, Real epsilon, IPrecond
   cout << "\n";
 #endif
   //Real norm0 = r.normInf();
-  Real delta0 = delta_new;
+  const Real delta0 = delta_new;
+
+
   //cout << " TOL=" << epsilon << " delta0=" << delta0 << '\n';
   //cout << " deltanew=" << delta_new << '\n';
   Integer nb_iter = 0;
diff --git a/arcane/src/arcane/core/matvec/Vector.cc b/arcane/src/arcane/core/matvec/Vector.cc
index a077048fe..4d1598e71 100644
--- a/arcane/src/arcane/core/matvec/Vector.cc
+++ b/arcane/src/arcane/core/matvec/Vector.cc
@@ -125,6 +125,16 @@ Vector(Integer size)
 /*---------------------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
 
+Vector::
+Vector(Integer size,Real init_value)
+: m_impl(new VectorImpl(size, init_value))
+{
+  m_impl->addReference();
+}
+
+/*---------------------------------------------------------------------------*/
+/*---------------------------------------------------------------------------*/
+
 Vector::
 Vector(const Vector& v)
 : m_impl(v.m_impl)