diff --git a/kernelcreation.py b/kernelcreation.py
index 1fb4eeef879a7ad1e8a7deba64cb1c8a01e4fa33..85c99e64ba4a87acf9d5e7ca761a130fd028a434 100644
--- a/kernelcreation.py
+++ b/kernelcreation.py
@@ -55,9 +55,6 @@ def create_kernel(assignments, target='cpu', data_type="double", iteration_slice
                [0., 4., 4., 4., 0.],
                [0., 0., 0., 0., 0.]])
     """
-    if isinstance(assignments, AssignmentCollection):
-        assignments = assignments.all_assignments
-
     # ----  Normalizing parameters
     split_groups = ()
     if isinstance(assignments, AssignmentCollection):