diff --git a/python/damask/grid_filters.py b/python/damask/grid_filters.py
index 462621e53..c60e973b9 100644
--- a/python/damask/grid_filters.py
+++ b/python/damask/grid_filters.py
@@ -186,7 +186,7 @@ def displacement_fluct_point(size: _FloatSequence,
         Fluctuating part of the cell center displacements.
 
     """
-    integrator = 0.5j*_np.array(size,float)/_np.pi
+    integrator = 0.5j*_np.ones(3)/_np.pi
 
     k_s = _ks(size,F.shape[:3],False)
     k_s_squared = _np.einsum('...l,...l',k_s,k_s)