diff --git a/cluster.cc b/cluster.cc
index 84358b8cca1313d933f4c43c11349f180b670a85..c1956c767d52c3bd8da44a4b4932d029907a8331 100644
--- a/cluster.cc
+++ b/cluster.cc
@@ -133,7 +133,8 @@ template <class S>
 void vox2mmcoord(vector<triple<float> >& coords, 
 				   const volume<S>& vol)
 {
-  float vx = vol.xdim()*vol.xsign(), vy = vol.ydim()*vol.ysign(), vz = vol.zdim()*vol.zsign();
+  float vx = vol.xdim()*vol.xsign(), vy = vol.ydim()*vol.ysign(), 
+    vz = vol.zdim()*vol.zsign();
   vox2mmcoord(coords,vx,vy,vz);
 }