diff --git a/pyVlsv/vlsvreader.py b/pyVlsv/vlsvreader.py
index 3ad8bf74..1deccd9b 100644
--- a/pyVlsv/vlsvreader.py
+++ b/pyVlsv/vlsvreader.py
@@ -358,10 +358,10 @@ def __init__(self, file_name, fsGridDecomposition=None):
                  pop.__precipitation_centre_energy = np.asarray(energybins)
                  vlsvvariables.speciesprecipitationenergybins[popname] = energybins
 
-              vlsvvariables.cellsize = self.__dx
+      vlsvvariables.cellsize = self.__dx
 
-              if self.check_parameter("j_per_b_modifier"):
-                 vlsvvariables.J_per_B_modifier = self.read_parameter("j_per_b_modifier")
+      if self.check_parameter("j_per_b_modifier"):
+         vlsvvariables.J_per_B_modifier = self.read_parameter("j_per_b_modifier")
 
       self.__fptr.close()