diff --git a/streamlines.cc b/streamlines.cc
index 16d0caf231f872f54714581a9da6334f0bc6435b..40fc92fae9cb55bf36ffd5618b6158e2bd383deb 100644
--- a/streamlines.cc
+++ b/streamlines.cc
@@ -67,7 +67,7 @@ namespace TRACT{
       m_Seeds_to_DTI = read_ascii_matrix(opts.seeds_to_dti.value());
     }
     else{
-      m_Seeds_to_DTI=Identity(4);
+      m_Seeds_to_DTI=IdentityMatrix(4);
     }
     vols.initialise(opts.basename.value());
     m_path.reserve(opts.nparticles.value());
diff --git a/streamlines.h b/streamlines.h
index 8f4548ecd09df58f60d66f7d007a68555c1de13b..6f00b69e9483e2e55bb5f1292a36e2323f093f52 100644
--- a/streamlines.h
+++ b/streamlines.h
@@ -130,7 +130,7 @@ namespace TRACT{
       m_beenhere.reinitialize(m_seeds.xsize(),m_seeds.ysize(),m_seeds.zsize());
       m_seedsdim.ReSize(3);
       m_seedsdim << m_seeds.xdim() <<m_seeds.ydim() <<m_seeds.zdim();
-      m_I=Identity(4);
+      m_I=IdentityMatrix(4);
       
     }