From 112dff118a22b0fcf63992c64feb49cb45f54d3d Mon Sep 17 00:00:00 2001
From: Arne Morten Kvarving <arne.morten.kvarving@sintef.no>
Date: Mon, 2 Jan 2023 13:29:37 +0100
Subject: [PATCH] UpscalerBase: avoid use of sstream

---
 opm/upscaling/UpscalerBase_impl.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/opm/upscaling/UpscalerBase_impl.hpp b/opm/upscaling/UpscalerBase_impl.hpp
index ff68e96..b653d7d 100644
--- a/opm/upscaling/UpscalerBase_impl.hpp
+++ b/opm/upscaling/UpscalerBase_impl.hpp
@@ -272,7 +272,7 @@ namespace Opm
 		}
 		break;
 	    default:
-		OPM_THROW(std::runtime_error, "Unknown boundary type: " << bctype_);
+        OPM_THROW(std::runtime_error, "Unknown boundary type: " + std::to_string(bctype_));
 	    }
 	    double delta = computeDelta(pdd);
 	    for (int i = 0; i < Dimension; ++i) {