diff --git a/fslstats.cc b/fslstats.cc
index 1ff9cbfe419d23742e25cdc3fb25500be236e5cc..c6a6ed245a129ef0433ad449e976861af4b14e90 100644
--- a/fslstats.cc
+++ b/fslstats.cc
@@ -132,7 +132,6 @@ int generate_masks(volume4D<float> &mask, volume4D<float> &masknz, const volume4
   mask = binarise(vin,lthr,uthr,exclusive);
   if (mask.tsize()!=1) masknz = (binarise(vin,0.0f, 0.0f)-1.0f)*-1.0f*mask;
   else masknz = (binarise(vin,0.0f, 0.0f)-1.0f)*-1.0f*mask[0];
-  save_volume4D(masknz,"masknz");
   return 0;
 }