diff --git a/backends/cbackend.py b/backends/cbackend.py
index 76eb3ee747ac07de4944ce9cda5a02227d94da78..00da70f27df4f8d0a6fddbdd211bd12f2858c7fd 100644
--- a/backends/cbackend.py
+++ b/backends/cbackend.py
@@ -272,6 +272,7 @@ class CustomSympyPrinter(CCodePrinter):
         else:
             return res
 
+
 # noinspection PyPep8Naming
 class VectorizedCustomSympyPrinter(CustomSympyPrinter):
     SummandInfo = namedtuple("SummandInfo", ['sign', 'term'])
diff --git a/transformations.py b/transformations.py
index ab7d98ab51a7207e31c39ccd81e8e05f1d12b029..d108b7011c1e4582b966b928820cf0d491d060b9 100644
--- a/transformations.py
+++ b/transformations.py
@@ -721,6 +721,8 @@ class KernelConstraintsCheck:
         elif isinstance(rhs, sp.Mul):
             new_args = [self.process_expression(arg) if arg not in (-1, 1) else arg for arg in rhs.args]
             return rhs.func(*new_args) if new_args else rhs
+        elif isinstance(rhs, sp.Indexed):
+            return rhs
         else:
             if isinstance(rhs, sp.Pow):
                 # don't process exponents -> they should remain integers