From 22a34c70b4e8169411232d6d9f019b7102749522 Mon Sep 17 00:00:00 2001
From: Xavier Raynaud <xavier.raynaud@sintef.no>
Date: Tue, 6 Mar 2012 15:58:30 +0100
Subject: [PATCH] Minor bug.

---
 opm/core/WellsManager.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/opm/core/WellsManager.cpp b/opm/core/WellsManager.cpp
index 8a5e71546..a933306b8 100644
--- a/opm/core/WellsManager.cpp
+++ b/opm/core/WellsManager.cpp
@@ -26,6 +26,7 @@
 #include <opm/core/utility/Units.hpp>
 
 #include <tr1/array>
+#include <cmath>
 
 
 // Helper structs and functions for the implementation.
@@ -125,6 +126,7 @@ namespace
 			    const double* cell_permeability,
 			    const double skin_factor)
     {
+	using namespace std;
 	// sse: Using the Peaceman model.
 	// NOTE: The formula is valid for cartesian grids, so the result can be a bit
 	// (in worst case: there is no upper bound for the error) off the mark.