diff --git a/fibre.h b/fibre.h
index 0df75be851f509fe379d3665b710a1d50a66df82..72f1705198e26729424a53a61979e17d39c271dc 100644
--- a/fibre.h
+++ b/fibre.h
@@ -58,8 +58,13 @@ namespace FIBRE{
     const ColumnVector& m_alpha;
     const ColumnVector& m_beta;
     const Matrix& m_bvals;
+<<<<<<< fibre.h
+    xfibresOptions& opts;
+  public:
+=======
     xfibresOptions& opts;
  public:
+>>>>>>> 1.10
     //constructors::
     Fibre( const ColumnVector& alpha, const ColumnVector& beta, 
 	   const Matrix& bvals,const float& d):
@@ -221,7 +226,12 @@ namespace FIBRE{
       if (m_f<0 | m_f>=1 )
 	return true;
       else{
-	m_f_prior=-(log(m_lam) + (m_lam-1)*log(1-m_f));
+	//m_f_prior=-(log(m_lam) + (m_lam-1)*log(1-m_f));
+	if(m_lam_jump)
+	  m_f_prior=log(1-f)+2*log(fabs(log(1-f))); //marginalised with uniform prior on lambda
+	else
+	  m_f_prior=0;
+	
 	m_f_prior=opts.fudge.value()*m_f_prior;
 	return false;
       }
@@ -696,20 +706,20 @@ namespace FIBRE{
 	  }
 	  
 	  
-	  if(!m_fibres[f].propose_lam()){
-	    compute_prior();
-	    compute_energy();
-	    if(test_energy()){
-	      m_fibres[f].accept_lam();
-	    }
-	    else{
-	      m_fibres[f].reject_lam();
-	      restore_energy_no_lik();
-	    }
-	  }
-	  else{
-	    m_fibres[f].reject_lam();
-	  }
+//	   if(!m_fibres[f].propose_lam()){
+// 	    compute_prior();
+// 	    compute_energy();
+// 	    if(test_energy()){
+// 	      m_fibres[f].accept_lam();
+// 	    }
+// 	    else{
+// 	      m_fibres[f].reject_lam();
+// 	      restore_energy_no_lik();
+// 	    }
+// 	  }
+// 	  else{
+// 	    m_fibres[f].reject_lam();
+// 	  }
       
  
       }