diff --git a/sumpy/expansion/__init__.py b/sumpy/expansion/__init__.py
index 17264e8e791b974529578e5de10719aaa71698ea..c78557d96c2ccf29821a79dbad869b2d2edd55ee 100644
--- a/sumpy/expansion/__init__.py
+++ b/sumpy/expansion/__init__.py
@@ -29,7 +29,7 @@ from pytools import memoize_method
 import sumpy.symbolic as sym
 from collections import defaultdict
 from sumpy.tools import add_mi
-from .pde_utils import make_pde_sym, laplacian
+from .pde import make_pde_sym, laplacian
 
 __doc__ = """
 .. autoclass:: ExpansionBase
diff --git a/sumpy/expansion/pde_utils.py b/sumpy/expansion/pde.py
similarity index 100%
rename from sumpy/expansion/pde_utils.py
rename to sumpy/expansion/pde.py