diff --git a/pre/BCs/inhomogeneous-mass-flux/prepare-inhomogeneous-mass-flux-BC.py b/pre/BCs/inhomogeneous-mass-flux/prepare-inhomogeneous-mass-flux-BC.py
index d467efa05d2d16c7783100541e613f5a8c036cbf..4d32204582e1024299ed0401638f185e1b088196 100755
--- a/pre/BCs/inhomogeneous-mass-flux/prepare-inhomogeneous-mass-flux-BC.py
+++ b/pre/BCs/inhomogeneous-mass-flux/prepare-inhomogeneous-mass-flux-BC.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env pvpython
+# -*- coding: utf-8 -*-
 
 import inspect
 
diff --git a/pre/inhomogeneous-fields/inhomogeneous-permeability-cell/prepare-inhomogeneous-permeability.py b/pre/inhomogeneous-fields/inhomogeneous-permeability-cell/prepare-inhomogeneous-permeability.py
index 4d7cb617c2b906ec05be9cee7532f428fa5ef0b9..0cffb6c16f8d3caf97f4be1031de34870cc7e470 100755
--- a/pre/inhomogeneous-fields/inhomogeneous-permeability-cell/prepare-inhomogeneous-permeability.py
+++ b/pre/inhomogeneous-fields/inhomogeneous-permeability-cell/prepare-inhomogeneous-permeability.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env pvpython
+# -*- coding: utf-8 -*-
 
 import inspect