diff --git a/pytato/utils.py b/pytato/utils.py
index a7ff40cfb..82d3768f8 100644
--- a/pytato/utils.py
+++ b/pytato/utils.py
@@ -236,14 +236,13 @@ def cast_to_result_type(
                 array: ArrayOrScalar,
                 expr: ScalarExpression
             ) -> ScalarExpression:
-        from pytato.scalar_expr import PYTHON_SCALAR_CLASSES
         if ((isinstance(array, Array) or isinstance(array, np.generic))
                 and array.dtype != result_dtype):
             # Loopy's type casts don't like casting to bool
             assert result_dtype != np.bool_
 
             expr = TypeCast(result_dtype, expr)
-        elif isinstance(expr, PYTHON_SCALAR_CLASSES):
+        elif isinstance(expr, (complex,)) and not isinstance(expr, np.generic):
             # See https://github.com/inducer/pytato/pull/247 and
             # https://github.com/inducer/pytato/issues/542
             expr = np.dtype(type(expr)).type(expr)