diff --git a/lib/algorithms/Preconditioner.h b/lib/algorithms/Preconditioner.h
new file mode 100644
index 00000000..e62c3ab7
--- /dev/null
+++ b/lib/algorithms/Preconditioner.h
@@ -0,0 +1,19 @@
+#ifndef GRID_PRECONDITIONER_H
+#define GRID_PRECONDITIONER_H
+
+namespace Grid {
+
+  template<class Field> class Preconditioner :  public LinearFunction<Field> { 
+    virtual void operator()(const Field &src, Field & psi)=0;
+  };
+
+  template<class Field> class TrivialPrecon :  public Preconditioner<Field> { 
+  public:
+    void operator()(const Field &src, Field & psi){
+      psi = src;
+    }
+    TrivialPrecon(void){};
+  };
+
+}
+#endif