diff --git a/python/damask/dadf5.py b/python/damask/dadf5.py
index ba81fa605..a50eb44f8 100644
--- a/python/damask/dadf5.py
+++ b/python/damask/dadf5.py
@@ -381,7 +381,7 @@ class DADF5():
     """
     def Cauchy(F,P):
       return  {
-               'data'  : mechanics.Cauchy(F['data']),P['data']),
+               'data'  : mechanics.Cauchy(F['data'],P['data']),
                'label' : 'sigma',
                'meta' : {
                         'Unit' :        P['meta']['Unit'],
diff --git a/python/damask/mechanics.py b/python/damask/mechanics.py
index 5f8dbc02d..dad601701 100644
--- a/python/damask/mechanics.py
+++ b/python/damask/mechanics.py
@@ -13,7 +13,7 @@ def deviator(x):
   if np.shape(x) == (3,3):
     return x - np.eye(3)*np.trace(x)/3.0
   else:
-    return d - np.einsum('ijk,i->ijk',np.broadcast_to(np.eye(3),[d.shape[0],3,3]),np.trace(d,axis1=1,axis2=2)/3.0) 
+    return x - np.einsum('ijk,i->ijk',np.broadcast_to(np.eye(3),[x.shape[0],3,3]),np.trace(x,axis1=1,axis2=2)/3.0) 
 
 
 def spherical(x):