From e6d4fdd83b34d5feb3896a7601bb4b9c972f3c44 Mon Sep 17 00:00:00 2001
From: Isuru Fernando <isuruf@gmail.com>
Date: Wed, 3 Apr 2019 13:22:00 -0500
Subject: [PATCH] Fix for Laplace

---
 sumpy/expansion/__init__.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sumpy/expansion/__init__.py b/sumpy/expansion/__init__.py
index 3ac64e9e..05233960 100644
--- a/sumpy/expansion/__init__.py
+++ b/sumpy/expansion/__init__.py
@@ -600,6 +600,8 @@ def process_pde(pde):
                     multiplier = m
                 elif multiplier != m:
                     return pde, 1
+    if multiplier is None:
+        return pde, 1
     eqs = []
     for eq in pde.eqs:
         new_eq = dict()
-- 
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