From 028a16a45a3f0306e4911f675e29f5acee120de1 Mon Sep 17 00:00:00 2001
From: Rowan Cockett <rowan@3ptscience.com>
Date: Fri, 29 Apr 2016 11:44:42 -0700
Subject: [PATCH] Syntax bug.

---
 SimPEG/Utils/io_utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SimPEG/Utils/io_utils.py b/SimPEG/Utils/io_utils.py
index f68ee68c..e46c13db 100644
--- a/SimPEG/Utils/io_utils.py
+++ b/SimPEG/Utils/io_utils.py
@@ -113,7 +113,7 @@ def surface2inds(vrtx, trgl, mesh, boundaries=True, internal=True):
     else:
         extractImpDistRectGridFilt.ExtractBoundaryCellsOff()
 
-    if internal=True is True:
+    if internal is True:
         extractImpDistRectGridFilt.ExtractInsideOn()
 
     else: