diff --git a/src/scheme/FiniteVolumesEulerUnknowns.hpp b/src/scheme/FiniteVolumesEulerUnknowns.hpp
index d7eec6457c913d6f01d2a4918672943909f2a48c..0d8a75c7cdd62d61d20e27931b2a8c7967811207 100644
--- a/src/scheme/FiniteVolumesEulerUnknowns.hpp
+++ b/src/scheme/FiniteVolumesEulerUnknowns.hpp
@@ -241,7 +241,11 @@ public:
 	if (xj[j][0]<0.7) {
   	  m_kj[j]=0.;
   	} else {
+	  if (xj[j][0]<0.85){
   	  m_kj[j]=0.5;
+	  } else {
+	    m_kj[j]=0.;
+	  }
   	}
       });