diff --git a/src/parameters.f90 b/src/parameters.f90
index 6dab424191e0786d80c413d9cc767f74fb568c35..8c9bcc49bd98e1ec13379611a020c316d936f2c2 100644
--- a/src/parameters.f90
+++ b/src/parameters.f90
@@ -255,7 +255,11 @@ subroutine parameter(input_i3d)
   dy2 = dy * dy
   dz2 = dz * dz
 
-  xnu=one/re
+  if (re.gt.0.001) then 
+   xnu=one/re
+  else 
+   xnu=zero
+  endif
   !! Constant pressure gradient, re = Re_tau -> use to compute Re_centerline
   if (cpg) then
     re_cent = (re/0.116_mytype)**(1.0_mytype/0.88_mytype)