diff --git a/pystencils/gpucuda/kernelcreation.py b/pystencils/gpucuda/kernelcreation.py
index eecfe278e4378cdbed8738275d2cfe813d350d7b..d002cb0f050c0faaa9ea987d49ff7d0385df7cbe 100644
--- a/pystencils/gpucuda/kernelcreation.py
+++ b/pystencils/gpucuda/kernelcreation.py
@@ -16,6 +16,7 @@ def create_cuda_kernel(assignments,
                        ghost_layers=None,
                        skip_independence_check=False,
                        use_textures_for_interpolation=True):
+    assert assignments, "Assignments must not be empty!"
     fields_read, fields_written, assignments = add_types(assignments, type_info, not skip_independence_check)
     all_fields = fields_read.union(fields_written)
     read_only_fields = set([f.name for f in fields_read - fields_written])
diff --git a/pystencils/kernelcreation.py b/pystencils/kernelcreation.py
index 408cc506b56f1da5c42522d24e28b7a902f391ad..555196a623ce61fcfd2a9a40272f06c27fb70e54 100644
--- a/pystencils/kernelcreation.py
+++ b/pystencils/kernelcreation.py
@@ -1,5 +1,5 @@
-from types import MappingProxyType
 from itertools import combinations
+from types import MappingProxyType
 
 import sympy as sp
 
@@ -74,6 +74,7 @@ def create_kernel(assignments,
                [0., 0., 0., 0., 0.]])
     """
     # ----  Normalizing parameters
+    assert assignments, "Assignments must not be empty!"
     split_groups = ()
     if isinstance(assignments, AssignmentCollection):
         if 'split_groups' in assignments.simplification_hints:
diff --git a/pystencils/simp/assignment_collection.py b/pystencils/simp/assignment_collection.py
index bf4074ed9287d5c9c77ef4776c62ceb1e4ffff4b..e4827cdbc09ccc8c6f692b86c64970e1f2b90983 100644
--- a/pystencils/simp/assignment_collection.py
+++ b/pystencils/simp/assignment_collection.py
@@ -404,6 +404,9 @@ class AssignmentCollection:
     def __eq__(self, other):
         return set(self.all_assignments) == set(other.all_assignments)
 
+    def __bool__(self):
+        return bool(self.all_assignments)
+
 
 class SymbolGen:
     """Default symbol generator producing number symbols ζ_0, ζ_1, ..."""